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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Mark the letter A, B, c, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. Sugars (A) like glucose (B) is (C) made (D) up of carbon, hydrogen, and oxygen atoms.

Tiếng Anh Tốt nghiệp THPT
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25 Bộ đề Ôn luyện thi THPTQG môn Sinh Học cực hay có lời giải (Đề số 17)

Rễ cây có thể hấp thụ ion khoáng theo cơ chế bị động, có bao nhiêu phát biểu đúng? I.                   Các ion khoáng khuếch tán theo sự chênh lệch nồng độ từ cao đến thấp. II.                Các ion khoáng hoà tan trong nước và vào rễ theo dòng nước. III.             Các ion khoáng khuếch tán từ nơi có áp suất thẩm thấu cao đến nơi có áp suất thẩm thấu thấp, không tiêu tốn năng lượng. Các ion khoáng khuếch tán từ nơi có thế nước thấp đến nơi có thế nước cao, không tiêu tốn năng lượng.

Sinh học Tốt nghiệp THPT
Xem chi tiết 615 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. She never lets her daughter participate in an activity unless it is under the supervision of an adult.

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử đề thi thử THPTQG môn Tiếng Anh có lời giải chi tiết (Đề số 10)

*Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.   Bacteria are the smallest known living things with a cellular structure. These colorless, one-celled micro-organisms exist (31)________organic matter is found: in soil, in water and in the air. Since most of them have no chlorophyll, they cannot use light energy to synthesize their food, (32)_________green plants do.They must get their food in other ways. In this, bacteria resemble animals. However, since they are enclosed in a cell wall, they can only (33)_________dissolved food like plants do. Although most bacteria do not contain chlorophyll, some of them can make their own organic food from simple inorganic (34)________. They do not, however, use light energy for this purpose. Others get ready-made food from dead plants and animals. Still others are parasites. Parasites are (35)________to enter other living organisms and take food from them. In doing so, they often cause diseases or the death of their hosts. (http://www. englishdaily626.com) Điền vào số 33  

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 14)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50. The need for a surgical operation, especially an emergency operation, almost always comes as a severe shock to the patient and his family. Despite modern advances, most people still have an irrational fear of hospitals, and anaesthetics. Patients do not often believe they really need surgery - cutting into a part of the body as opposed to treatment with drugs. In the early years of the 20th century there was little specialization in surgery. A good surgeon was capable of performing almost every operation that had been advised up to that time. Today the situation is different. Operations are now being carried out that were not even dreamed of fifty years ago. The heart can be safely opened and its valves repaired. Clogged blood vessels can be cleaned out, and broken ones mended or replaced. A lung, the whole stomach, or even part of the brain can be removed and still permit the patient to live comfortable and satisfactory life. However, not every surgeon wants to, or is qualified to carry out every type of modern operation. The scope of surgery has increased remarkably in the past decades. Its safety has increased too. Deaths from most operations are about 20% of what they were in 1910 and surgery has been extended in many directions, for example to certain types of birth defects in new born babies, and, at the other end of the scale, to life saving operations for the octogenarian. The hospital stay after surgery has been shortened to as little as a week for most major operations. Most patients are out of bed on the day after an operation and may be back at work in two or three weeks. Many developments in modern surgery are almost incredible. They include replacement of damaged blood vessels with simulated ones made of plastic: the replacement of heart valves with plastic substitutes; the transplanting of tissues such as lens of the eye; the invention of the artificial kidney to clean the blood of poisons at regular intervals and the development of heart and lung machines to keep patients alive during very long operations. All these things open a hopeful vista for the future of surgery. One of the most revolutionary areas of modem surgery is that of organ transplants. Until a few decades ago, no person, except an identical twin, was able to accept into his body the tissues of another person without reacting against them and eventually killing them. Recently, however, it has been discovered that with the use of X-rays and special drugs, it is possible to graft tissues from one person to another which will survive for periods of a year or more. Kidneys have been successfully transplanted between non-identical twins. Heart and lung transplants have also been reasonably successful. "Spare parts" surgery, the simple routine replacement of all worn-out organs by new ones, is still a dream of the future but surgery is ready for such miracles. In the meantime, you can be happy if your doctors say to you, "Yes, I think it is possible to operate on you for this condition." Question 45: A patient can still live a comfortable life even after the removal of _________.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 1.2 K lượt xem 6 năm trước
Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 403 lượt xem 6 năm trước
25 Bộ đề Ôn luyện thi THPTQG môn Sinh Học cực hay có lời giải (Đề số 17)

Một giống cà chua có alen A quy định thân cao trội hoàn toàn so với a quy định thân thấp, B quy định quả tròn trội hoàn toàn so với b quy định quả bầu dục, các gen liên kết hoàn toàn. Phép lai cho đời con phân theo tỷ lệ 1 : 2 : 1 là:

Sinh học Tốt nghiệp THPT
Xem chi tiết 6.3 K lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. People rumour that the Prince secretly got married to an ordinary girl.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 483 lượt xem 6 năm trước
Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 362 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. Alex doesn’t find it difficult to get up early in the morning.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 4.6 K lượt xem 6 năm trước
Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 14)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50. The need for a surgical operation, especially an emergency operation, almost always comes as a severe shock to the patient and his family. Despite modern advances, most people still have an irrational fear of hospitals, and anaesthetics. Patients do not often believe they really need surgery - cutting into a part of the body as opposed to treatment with drugs. In the early years of the 20th century there was little specialization in surgery. A good surgeon was capable of performing almost every operation that had been advised up to that time. Today the situation is different. Operations are now being carried out that were not even dreamed of fifty years ago. The heart can be safely opened and its valves repaired. Clogged blood vessels can be cleaned out, and broken ones mended or replaced. A lung, the whole stomach, or even part of the brain can be removed and still permit the patient to live comfortable and satisfactory life. However, not every surgeon wants to, or is qualified to carry out every type of modern operation. The scope of surgery has increased remarkably in the past decades. Its safety has increased too. Deaths from most operations are about 20% of what they were in 1910 and surgery has been extended in many directions, for example to certain types of birth defects in new born babies, and, at the other end of the scale, to life saving operations for the octogenarian. The hospital stay after surgery has been shortened to as little as a week for most major operations. Most patients are out of bed on the day after an operation and may be back at work in two or three weeks. Many developments in modern surgery are almost incredible. They include replacement of damaged blood vessels with simulated ones made of plastic: the replacement of heart valves with plastic substitutes; the transplanting of tissues such as lens of the eye; the invention of the artificial kidney to clean the blood of poisons at regular intervals and the development of heart and lung machines to keep patients alive during very long operations. All these things open a hopeful vista for the future of surgery. One of the most revolutionary areas of modem surgery is that of organ transplants. Until a few decades ago, no person, except an identical twin, was able to accept into his body the tissues of another person without reacting against them and eventually killing them. Recently, however, it has been discovered that with the use of X-rays and special drugs, it is possible to graft tissues from one person to another which will survive for periods of a year or more. Kidneys have been successfully transplanted between non-identical twins. Heart and lung transplants have also been reasonably successful. "Spare parts" surgery, the simple routine replacement of all worn-out organs by new ones, is still a dream of the future but surgery is ready for such miracles. In the meantime, you can be happy if your doctors say to you, "Yes, I think it is possible to operate on you for this condition." Question 44: Surgeons in the early 20th century, compared with modem ones _______.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 1.4 K lượt xem 6 năm trước
Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in the pronunciation in each of the following questions

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 327 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   The concept of being environmentally conscious, or “green,” has become more prevalent in twenty first-century U.S. culture. It has begun to affect the manufacturing of everything from non-toxic household cleaning products to motor vehicles powered by alternative sources of energy. However, one way of being “green” that is perhaps not as apparent to the viewer but of equal importance in being environmentally conscious, is the construction of buildings that are considered “sustainable.” Sustainable buildings are those that do not impose on the environment or rely on the over-utilization of energy or natural resources. There are four main principles of sustainability, which include consideration of the health and stability of all living things and their environmental diversity, as well as the economic opportunities of humanity.   Sustainable architecture consists of environmentally conscious design techniques. In the past, the demolition of an old building meant that all or most of the debris of the building would end up in a landfill or a waste disposal site. Today, architects can plan and design a building that uses recycled materials, such as wood, concrete, stone, or metal. These materials are salvaged from the demolition of an older building and can be appropriately incorporated into a new construction. Architects and construction supervisors may also choose to recycle more organic parts of demolished buildings, such as wooden doors, windows and other glass, ceramics, paper, and textiles.   A problem that has often arisen has been with how a site crew-whether it is demolition or construction crew determines and sorts what is “waste” and what is recyclable. Architects and environmental scientists have to decide whether or not a material is appropriate for use in new construction and how it will impact the environment. They must evaluate the materials from the demolition and determine what those materials contain, and if they meet the standards set by the U.S. government’s Environmental Protection Agency (the EPA). If the debris from the demolition contains hazardous materials that are harmful to the environment or to the consumer, such as asbestos, then the material is not salvageable. Use of asbestos for insulation and as a form of fire retardation in buildings and fabrics was common in the nineteenth century. Asbestos was once used in shingles on the sides of old buildings, as well as in the insulation in the interior walls of homes or other construction. In new “green” construction, insulation that was once asbestos-based can be replaced with recycled denim or constructed with cellulose-a fibrous material found in paper products. The same assessment applies to wood or wallboard painted with toxic lead-based paints. In addition, gas-flow regulators and meters on both water and gas heating systems constructed prior to 1961 must be carefully evaluated to determine that they do not contain dangerous substances such as mercury. Mercury can be harmful to humans and the environment if it is spilled during the removal of these devices. In paragraph 3, the author mentions all of the following hazardous materials found in debris from a demolition site EXCEPT _____________ .

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 377 lượt xem 6 năm trước
Tổng hợp đề thi thử THPT Quốc gia môn Sinh có đáp án (Đề số 17)

Trong các hình thức sinh sản ở thực vật, ghép là phương pháp có đặc điểm I. Cành ghép  hoặc chồi ghép có đặc tính tốt mà con người mong muốn. II. Chồi hoặc cành ghép phải đồng sinh học với gốc ghép (cùng loài, cùng giống) III. Chất dinh dưỡng của gốc ghép sẽ nuôi cành ghép hoặc chồi ghép. IV. Chất lượng hoa quả cũng như sức sống của cây ghép phải tốt hơn cành hoặc chồi ghép. Số phương án đúng là:

Sinh học Tốt nghiệp THPT
Xem chi tiết 7.2 K lượt xem 6 năm trước
229 Bài tập thí nghiệm từ đề thi đại học cực hay có lời giải(P2)

Tiến hành thí nghiệm như hình vẽ: Ban đầu trong cốc chứa nước vôi trong. Sục rất từ từ CO2 vào cốc cho tới dư. Hỏi độ sáng của bóng đèn thay đổi như thế nào?

Hóa học Tốt nghiệp THPT
Xem chi tiết 720 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   The concept of being environmentally conscious, or “green,” has become more prevalent in twenty first-century U.S. culture. It has begun to affect the manufacturing of everything from non-toxic household cleaning products to motor vehicles powered by alternative sources of energy. However, one way of being “green” that is perhaps not as apparent to the viewer but of equal importance in being environmentally conscious, is the construction of buildings that are considered “sustainable.” Sustainable buildings are those that do not impose on the environment or rely on the over-utilization of energy or natural resources. There are four main principles of sustainability, which include consideration of the health and stability of all living things and their environmental diversity, as well as the economic opportunities of humanity.   Sustainable architecture consists of environmentally conscious design techniques. In the past, the demolition of an old building meant that all or most of the debris of the building would end up in a landfill or a waste disposal site. Today, architects can plan and design a building that uses recycled materials, such as wood, concrete, stone, or metal. These materials are salvaged from the demolition of an older building and can be appropriately incorporated into a new construction. Architects and construction supervisors may also choose to recycle more organic parts of demolished buildings, such as wooden doors, windows and other glass, ceramics, paper, and textiles.   A problem that has often arisen has been with how a site crew-whether it is demolition or construction crew determines and sorts what is “waste” and what is recyclable. Architects and environmental scientists have to decide whether or not a material is appropriate for use in new construction and how it will impact the environment. They must evaluate the materials from the demolition and determine what those materials contain, and if they meet the standards set by the U.S. government’s Environmental Protection Agency (the EPA). If the debris from the demolition contains hazardous materials that are harmful to the environment or to the consumer, such as asbestos, then the material is not salvageable. Use of asbestos for insulation and as a form of fire retardation in buildings and fabrics was common in the nineteenth century. Asbestos was once used in shingles on the sides of old buildings, as well as in the insulation in the interior walls of homes or other construction. In new “green” construction, insulation that was once asbestos-based can be replaced with recycled denim or constructed with cellulose-a fibrous material found in paper products. The same assessment applies to wood or wallboard painted with toxic lead-based paints. In addition, gas-flow regulators and meters on both water and gas heating systems constructed prior to 1961 must be carefully evaluated to determine that they do not contain dangerous substances such as mercury. Mercury can be harmful to humans and the environment if it is spilled during the removal of these devices. The word “they” in paragraph 3 refers to _____________ .

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 398 lượt xem 6 năm trước
Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 14)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 43 to 50. The need for a surgical operation, especially an emergency operation, almost always comes as a severe shock to the patient and his family. Despite modern advances, most people still have an irrational fear of hospitals, and anaesthetics. Patients do not often believe they really need surgery - cutting into a part of the body as opposed to treatment with drugs. In the early years of the 20th century there was little specialization in surgery. A good surgeon was capable of performing almost every operation that had been advised up to that time. Today the situation is different. Operations are now being carried out that were not even dreamed of fifty years ago. The heart can be safely opened and its valves repaired. Clogged blood vessels can be cleaned out, and broken ones mended or replaced. A lung, the whole stomach, or even part of the brain can be removed and still permit the patient to live comfortable and satisfactory life. However, not every surgeon wants to, or is qualified to carry out every type of modern operation. The scope of surgery has increased remarkably in the past decades. Its safety has increased too. Deaths from most operations are about 20% of what they were in 1910 and surgery has been extended in many directions, for example to certain types of birth defects in new born babies, and, at the other end of the scale, to life saving operations for the octogenarian. The hospital stay after surgery has been shortened to as little as a week for most major operations. Most patients are out of bed on the day after an operation and may be back at work in two or three weeks. Many developments in modern surgery are almost incredible. They include replacement of damaged blood vessels with simulated ones made of plastic: the replacement of heart valves with plastic substitutes; the transplanting of tissues such as lens of the eye; the invention of the artificial kidney to clean the blood of poisons at regular intervals and the development of heart and lung machines to keep patients alive during very long operations. All these things open a hopeful vista for the future of surgery. One of the most revolutionary areas of modem surgery is that of organ transplants. Until a few decades ago, no person, except an identical twin, was able to accept into his body the tissues of another person without reacting against them and eventually killing them. Recently, however, it has been discovered that with the use of X-rays and special drugs, it is possible to graft tissues from one person to another which will survive for periods of a year or more. Kidneys have been successfully transplanted between non-identical twins. Heart and lung transplants have also been reasonably successful. "Spare parts" surgery, the simple routine replacement of all worn-out organs by new ones, is still a dream of the future but surgery is ready for such miracles. In the meantime, you can be happy if your doctors say to you, "Yes, I think it is possible to operate on you for this condition." Question 43: Most people are afraid of being operated on __________.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 431 lượt xem 6 năm trước
Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in the p Mark the letter A, B, C, or D on your answer sheet to indicate the word whose ronunciation in each of the following questions

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 386 lượt xem 6 năm trước
30 đề thi thử đề thi thử THPTQG môn Tiếng Anh có lời giải chi tiết (Đề số 10)

*Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.   Bacteria are the smallest known living things with a cellular structure. These colorless, one-celled micro-organisms exist (31)________organic matter is found: in soil, in water and in the air. Since most of them have no chlorophyll, they cannot use light energy to synthesize their food, (32)_________green plants do.They must get their food in other ways. In this, bacteria resemble animals. However, since they are enclosed in a cell wall, they can only (33)_________dissolved food like plants do. Although most bacteria do not contain chlorophyll, some of them can make their own organic food from simple inorganic (34)________. They do not, however, use light energy for this purpose. Others get ready-made food from dead plants and animals. Still others are parasites. Parasites are (35)________to enter other living organisms and take food from them. In doing so, they often cause diseases or the death of their hosts. (http://www. englishdaily626.com) Điền vào số 32

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT Quốc gia môn Sinh có đáp án (Đề số 17)

Khi cho 2 con gà đều thuần chủng mang gen tương phản lai với nhau được F1 toàn lông xám, có sọc. Cho gà mái F1 lai phân tích thu được thế hệ Fa có : 10 gà mái lông vàng, có sọc; 10 gà mái lông vàng, trơn; 8 gà trống lông xám, có sọc; 8 gà trống lông vàng, trơn; 2 gà trống lông xám, trơn; 2 gà trống lông vàng, có sọc. Biết rằng lông có sọc (D) là trội hoàn toàn so với lông trơn (d). Có bao nhiêu phát biểu đúng trong số những phát biểu sau: (1) Tính trạng màu sắc lông di truyền theo quy luật tương tác gen bổ sung. (2) Một trong hai cặp gen quy định tính trạng màu sắc lông di truyền liên kết với giới tính X (Y không alen), cặp gen còn lại di truyền liên kết với cặp gen quy định dạng lông. (3) Có xảy ra hoán vị gen với tần số 30%. (4) Gà trống F1 có kiểu gen XBXbADad hoặc XAXaBDbd.

Sinh học Tốt nghiệp THPT
Xem chi tiết 5.9 K lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   The concept of being environmentally conscious, or “green,” has become more prevalent in twenty first-century U.S. culture. It has begun to affect the manufacturing of everything from non-toxic household cleaning products to motor vehicles powered by alternative sources of energy. However, one way of being “green” that is perhaps not as apparent to the viewer but of equal importance in being environmentally conscious, is the construction of buildings that are considered “sustainable.” Sustainable buildings are those that do not impose on the environment or rely on the over-utilization of energy or natural resources. There are four main principles of sustainability, which include consideration of the health and stability of all living things and their environmental diversity, as well as the economic opportunities of humanity.   Sustainable architecture consists of environmentally conscious design techniques. In the past, the demolition of an old building meant that all or most of the debris of the building would end up in a landfill or a waste disposal site. Today, architects can plan and design a building that uses recycled materials, such as wood, concrete, stone, or metal. These materials are salvaged from the demolition of an older building and can be appropriately incorporated into a new construction. Architects and construction supervisors may also choose to recycle more organic parts of demolished buildings, such as wooden doors, windows and other glass, ceramics, paper, and textiles.   A problem that has often arisen has been with how a site crew-whether it is demolition or construction crew determines and sorts what is “waste” and what is recyclable. Architects and environmental scientists have to decide whether or not a material is appropriate for use in new construction and how it will impact the environment. They must evaluate the materials from the demolition and determine what those materials contain, and if they meet the standards set by the U.S. government’s Environmental Protection Agency (the EPA). If the debris from the demolition contains hazardous materials that are harmful to the environment or to the consumer, such as asbestos, then the material is not salvageable. Use of asbestos for insulation and as a form of fire retardation in buildings and fabrics was common in the nineteenth century. Asbestos was once used in shingles on the sides of old buildings, as well as in the insulation in the interior walls of homes or other construction. In new “green” construction, insulation that was once asbestos-based can be replaced with recycled denim or constructed with cellulose-a fibrous material found in paper products. The same assessment applies to wood or wallboard painted with toxic lead-based paints. In addition, gas-flow regulators and meters on both water and gas heating systems constructed prior to 1961 must be carefully evaluated to determine that they do not contain dangerous substances such as mercury. Mercury can be harmful to humans and the environment if it is spilled during the removal of these devices. In paragraph 3, the author mention both demolition and construction crews in order to _____________ .

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 325 lượt xem 6 năm trước
Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (1) _______ ecosystems. If there is too (2) _______ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for he pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal and lets the seeds (3) _______. Polluting the air, soil, and water can harm ecosystems. Building (4) _______ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and governments to find better ways of (5) _______ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems. Điền vào ô trống 5

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 14)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 36 to 42. Life originated in the early seas less than a billion years after the Earth was formed. Yet another three billions years were to pass before the first plants and animals appeared on the continents. Life's transition from the sea to the land was perhaps as much of an evolutionary challenge as was the genesis of life. What forms of life were able to make such a drastic change in lifestyle? The traditional view of the first terrestrial organisms is based on megafossils - relatively large specimens of essential whole plants and animals. Vascular plants, related to modern seed plants and ferns, left the first comprehensive megafossil record. Because of this, it has been commonly assumed that the sequence of terrestrialization reflected the evolution of 10 modern terrestrial ecosystems. In this view, primitive vascular plants first colonized the margins of continental waters, followed by animals that fed on the plants, and lastly by the animals that preyed on the plant-eaters. Moreover, the megafossils suggest that terrestrial life appeared and diversified explosively near the boundary between the Silurian and the Devonian periods, a little more than 400 million years ago. Recently, however, paleontologists have been taking a closer look at sediments below this Silurian- Devonian geological boundary. It turns out that some fossils can be extracted from these sediments by putting the rock in an acid bath. The technique has uncovered new evidence from sediments that were deposited near the shores of the ancient oceans - plant microfossils and microscopic pieces of small animals. In many instances, the specimens are less than one-tenth of a millimeter in diameter. Although they were entombed in the rocks for hundreds of millions of years, many of the fossils consist of the organic remains of the organism. These discovered fossils have not only revealed the existence ofpreviously unknown organisms, but have also pushed back these dates for the invasion of land by multicellular organisms. Our view about the nature of the early plants and animal communities are now being revised. And with those revisions come new speculations about the first terrestrial life-forms. Question 42: With which of the following conclusions would the author probably agree?

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   The concept of being environmentally conscious, or “green,” has become more prevalent in twenty first-century U.S. culture. It has begun to affect the manufacturing of everything from non-toxic household cleaning products to motor vehicles powered by alternative sources of energy. However, one way of being “green” that is perhaps not as apparent to the viewer but of equal importance in being environmentally conscious, is the construction of buildings that are considered “sustainable.” Sustainable buildings are those that do not impose on the environment or rely on the over-utilization of energy or natural resources. There are four main principles of sustainability, which include consideration of the health and stability of all living things and their environmental diversity, as well as the economic opportunities of humanity.   Sustainable architecture consists of environmentally conscious design techniques. In the past, the demolition of an old building meant that all or most of the debris of the building would end up in a landfill or a waste disposal site. Today, architects can plan and design a building that uses recycled materials, such as wood, concrete, stone, or metal. These materials are salvaged from the demolition of an older building and can be appropriately incorporated into a new construction. Architects and construction supervisors may also choose to recycle more organic parts of demolished buildings, such as wooden doors, windows and other glass, ceramics, paper, and textiles.   A problem that has often arisen has been with how a site crew-whether it is demolition or construction crew determines and sorts what is “waste” and what is recyclable. Architects and environmental scientists have to decide whether or not a material is appropriate for use in new construction and how it will impact the environment. They must evaluate the materials from the demolition and determine what those materials contain, and if they meet the standards set by the U.S. government’s Environmental Protection Agency (the EPA). If the debris from the demolition contains hazardous materials that are harmful to the environment or to the consumer, such as asbestos, then the material is not salvageable. Use of asbestos for insulation and as a form of fire retardation in buildings and fabrics was common in the nineteenth century. Asbestos was once used in shingles on the sides of old buildings, as well as in the insulation in the interior walls of homes or other construction. In new “green” construction, insulation that was once asbestos-based can be replaced with recycled denim or constructed with cellulose-a fibrous material found in paper products. The same assessment applies to wood or wallboard painted with toxic lead-based paints. In addition, gas-flow regulators and meters on both water and gas heating systems constructed prior to 1961 must be carefully evaluated to determine that they do not contain dangerous substances such as mercury. Mercury can be harmful to humans and the environment if it is spilled during the removal of these devices. According to paragraph 2, environmentally conscious design incorporates _____________ .

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (1) _______ ecosystems. If there is too (2) _______ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for he pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal and lets the seeds (3) _______. Polluting the air, soil, and water can harm ecosystems. Building (4) _______ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and governments to find better ways of (5) _______ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems. Điền vào ô trống 4

Tiếng Anh Tốt nghiệp THPT
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25 Bộ đề Ôn luyện thi THPTQG môn Sinh Học cực hay có lời giải (Đề số 17)

Ở người, bệnh bạch tạng do gen lặn nằm trên NST thường quy định. Bố và mẹ đều có kiểu gen dị hợp tử. Xác suất để cặp bố, mẹ này sinh được một đứa con trai bị bệnh và một đứa con gái bình thường là bao nhiêu? Biết rằng tỷ lệ sinh nam : nữ lần lượt là 1 : 1.

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   The concept of being environmentally conscious, or “green,” has become more prevalent in twenty first-century U.S. culture. It has begun to affect the manufacturing of everything from non-toxic household cleaning products to motor vehicles powered by alternative sources of energy. However, one way of being “green” that is perhaps not as apparent to the viewer but of equal importance in being environmentally conscious, is the construction of buildings that are considered “sustainable.” Sustainable buildings are those that do not impose on the environment or rely on the over-utilization of energy or natural resources. There are four main principles of sustainability, which include consideration of the health and stability of all living things and their environmental diversity, as well as the economic opportunities of humanity.   Sustainable architecture consists of environmentally conscious design techniques. In the past, the demolition of an old building meant that all or most of the debris of the building would end up in a landfill or a waste disposal site. Today, architects can plan and design a building that uses recycled materials, such as wood, concrete, stone, or metal. These materials are salvaged from the demolition of an older building and can be appropriately incorporated into a new construction. Architects and construction supervisors may also choose to recycle more organic parts of demolished buildings, such as wooden doors, windows and other glass, ceramics, paper, and textiles.   A problem that has often arisen has been with how a site crew-whether it is demolition or construction crew determines and sorts what is “waste” and what is recyclable. Architects and environmental scientists have to decide whether or not a material is appropriate for use in new construction and how it will impact the environment. They must evaluate the materials from the demolition and determine what those materials contain, and if they meet the standards set by the U.S. government’s Environmental Protection Agency (the EPA). If the debris from the demolition contains hazardous materials that are harmful to the environment or to the consumer, such as asbestos, then the material is not salvageable. Use of asbestos for insulation and as a form of fire retardation in buildings and fabrics was common in the nineteenth century. Asbestos was once used in shingles on the sides of old buildings, as well as in the insulation in the interior walls of homes or other construction. In new “green” construction, insulation that was once asbestos-based can be replaced with recycled denim or constructed with cellulose-a fibrous material found in paper products. The same assessment applies to wood or wallboard painted with toxic lead-based paints. In addition, gas-flow regulators and meters on both water and gas heating systems constructed prior to 1961 must be carefully evaluated to determine that they do not contain dangerous substances such as mercury. Mercury can be harmful to humans and the environment if it is spilled during the removal of these devices. In paragraph 2, the word “salvaged” is closest in meaning to _____________ .

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT Quốc gia môn Sinh có đáp án (Đề số 17)

Ở một loài tính trạng màu lông do cặp gen Aa quy định; tính trạng chiều dài lông do cặp gen Bb quy định, tính trạng màu mỡ do cặp gen Dd quy định. Đem các cá thể lông đen, dài, mỡ trắng với cá thể lông nâu, ngắn, mỡ vàng, thu được F1 đồng loạt có kiểu hình lông đen, dài, mỡ trắng. Cho cá thể F1 dị hợp 3 cặp lai phân tích người ta thu được kết quả phân li theo tỉ lệ 17,5% lông đen,dài, mỡ trắng; 17,5% lông đen , ngắn, mỡ trắng; 17,5% lông nâu, dài, mỡ vàng; 17,5% lông nâu, ngắn, mỡ vàng; 7,5% lông đen, dài, mỡ vàng; 7,5% lông đen, ngắn, mỡ vàng; 7,5% lông nâu, dài, mỡ trắng; 7,5% lông nâu, ngắn, mỡ trắng Kiểu gen và tần số hoán vị của cơ thể F1 là

Sinh học Tốt nghiệp THPT
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30 đề thi thử đề thi thử THPTQG môn Tiếng Anh có lời giải chi tiết (Đề số 10)

*Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.   Bacteria are the smallest known living things with a cellular structure. These colorless, one-celled micro-organisms exist (31)________organic matter is found: in soil, in water and in the air. Since most of them have no chlorophyll, they cannot use light energy to synthesize their food, (32)_________green plants do.They must get their food in other ways. In this, bacteria resemble animals. However, since they are enclosed in a cell wall, they can only (33)_________dissolved food like plants do. Although most bacteria do not contain chlorophyll, some of them can make their own organic food from simple inorganic (34)________. They do not, however, use light energy for this purpose. Others get ready-made food from dead plants and animals. Still others are parasites. Parasites are (35)________to enter other living organisms and take food from them. In doing so, they often cause diseases or the death of their hosts. (http://www. englishdaily626.com)  Điền vào số 31

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (1) _______ ecosystems. If there is too (2) _______ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for he pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal and lets the seeds (3) _______. Polluting the air, soil, and water can harm ecosystems. Building (4) _______ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and governments to find better ways of (5) _______ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems. Điền vào ô trống 3

Tiếng Anh Tốt nghiệp THPT
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229 Bài tập thí nghiệm từ đề thi đại học cực hay có lời giải(P2)

Các dung dịch riêng biệt: Na2CO­3, BaCl2, FeCl2, H2SO4, NaOH được đánh số ngẫu nhiên (1), (2), (3), (4), (5). Tiến hành một số thí nghiệm, kết quả ghi lại trong bảng sau: Các dung dịch (1), (3), (5) lần lượt là:

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   The concept of being environmentally conscious, or “green,” has become more prevalent in twenty first-century U.S. culture. It has begun to affect the manufacturing of everything from non-toxic household cleaning products to motor vehicles powered by alternative sources of energy. However, one way of being “green” that is perhaps not as apparent to the viewer but of equal importance in being environmentally conscious, is the construction of buildings that are considered “sustainable.” Sustainable buildings are those that do not impose on the environment or rely on the over-utilization of energy or natural resources. There are four main principles of sustainability, which include consideration of the health and stability of all living things and their environmental diversity, as well as the economic opportunities of humanity.   Sustainable architecture consists of environmentally conscious design techniques. In the past, the demolition of an old building meant that all or most of the debris of the building would end up in a landfill or a waste disposal site. Today, architects can plan and design a building that uses recycled materials, such as wood, concrete, stone, or metal. These materials are salvaged from the demolition of an older building and can be appropriately incorporated into a new construction. Architects and construction supervisors may also choose to recycle more organic parts of demolished buildings, such as wooden doors, windows and other glass, ceramics, paper, and textiles.   A problem that has often arisen has been with how a site crew-whether it is demolition or construction crew determines and sorts what is “waste” and what is recyclable. Architects and environmental scientists have to decide whether or not a material is appropriate for use in new construction and how it will impact the environment. They must evaluate the materials from the demolition and determine what those materials contain, and if they meet the standards set by the U.S. government’s Environmental Protection Agency (the EPA). If the debris from the demolition contains hazardous materials that are harmful to the environment or to the consumer, such as asbestos, then the material is not salvageable. Use of asbestos for insulation and as a form of fire retardation in buildings and fabrics was common in the nineteenth century. Asbestos was once used in shingles on the sides of old buildings, as well as in the insulation in the interior walls of homes or other construction. In new “green” construction, insulation that was once asbestos-based can be replaced with recycled denim or constructed with cellulose-a fibrous material found in paper products. The same assessment applies to wood or wallboard painted with toxic lead-based paints. In addition, gas-flow regulators and meters on both water and gas heating systems constructed prior to 1961 must be carefully evaluated to determine that they do not contain dangerous substances such as mercury. Mercury can be harmful to humans and the environment if it is spilled during the removal of these devices. According to paragraph 1, which of the following is true?

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (1) _______ ecosystems. If there is too (2) _______ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for he pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal and lets the seeds (3) _______. Polluting the air, soil, and water can harm ecosystems. Building (4) _______ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and governments to find better ways of (5) _______ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems. Điền vào ô trống 2

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 14)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 36 to 42. Life originated in the early seas less than a billion years after the Earth was formed. Yet another three billions years were to pass before the first plants and animals appeared on the continents. Life's transition from the sea to the land was perhaps as much of an evolutionary challenge as was the genesis of life. What forms of life were able to make such a drastic change in lifestyle? The traditional view of the first terrestrial organisms is based on megafossils - relatively large specimens of essential whole plants and animals. Vascular plants, related to modern seed plants and ferns, left the first comprehensive megafossil record. Because of this, it has been commonly assumed that the sequence of terrestrialization reflected the evolution of 10 modern terrestrial ecosystems. In this view, primitive vascular plants first colonized the margins of continental waters, followed by animals that fed on the plants, and lastly by the animals that preyed on the plant-eaters. Moreover, the megafossils suggest that terrestrial life appeared and diversified explosively near the boundary between the Silurian and the Devonian periods, a little more than 400 million years ago. Recently, however, paleontologists have been taking a closer look at sediments below this Silurian- Devonian geological boundary. It turns out that some fossils can be extracted from these sediments by putting the rock in an acid bath. The technique has uncovered new evidence from sediments that were deposited near the shores of the ancient oceans - plant microfossils and microscopic pieces of small animals. In many instances, the specimens are less than one-tenth of a millimeter in diameter. Although they were entombed in the rocks for hundreds of millions of years, many of the fossils consist of the organic remains of the organism. These discovered fossils have not only revealed the existence ofpreviously unknown organisms, but have also pushed back these dates for the invasion of land by multicellular organisms. Our view about the nature of the early plants and animal communities are now being revised. And with those revisions come new speculations about the first terrestrial life-forms. Question 41: Which of the following resulted from the discovery of microscopic fossils?

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   The concept of being environmentally conscious, or “green,” has become more prevalent in twenty first-century U.S. culture. It has begun to affect the manufacturing of everything from non-toxic household cleaning products to motor vehicles powered by alternative sources of energy. However, one way of being “green” that is perhaps not as apparent to the viewer but of equal importance in being environmentally conscious, is the construction of buildings that are considered “sustainable.” Sustainable buildings are those that do not impose on the environment or rely on the over-utilization of energy or natural resources. There are four main principles of sustainability, which include consideration of the health and stability of all living things and their environmental diversity, as well as the economic opportunities of humanity.   Sustainable architecture consists of environmentally conscious design techniques. In the past, the demolition of an old building meant that all or most of the debris of the building would end up in a landfill or a waste disposal site. Today, architects can plan and design a building that uses recycled materials, such as wood, concrete, stone, or metal. These materials are salvaged from the demolition of an older building and can be appropriately incorporated into a new construction. Architects and construction supervisors may also choose to recycle more organic parts of demolished buildings, such as wooden doors, windows and other glass, ceramics, paper, and textiles.   A problem that has often arisen has been with how a site crew-whether it is demolition or construction crew determines and sorts what is “waste” and what is recyclable. Architects and environmental scientists have to decide whether or not a material is appropriate for use in new construction and how it will impact the environment. They must evaluate the materials from the demolition and determine what those materials contain, and if they meet the standards set by the U.S. government’s Environmental Protection Agency (the EPA). If the debris from the demolition contains hazardous materials that are harmful to the environment or to the consumer, such as asbestos, then the material is not salvageable. Use of asbestos for insulation and as a form of fire retardation in buildings and fabrics was common in the nineteenth century. Asbestos was once used in shingles on the sides of old buildings, as well as in the insulation in the interior walls of homes or other construction. In new “green” construction, insulation that was once asbestos-based can be replaced with recycled denim or constructed with cellulose-a fibrous material found in paper products. The same assessment applies to wood or wallboard painted with toxic lead-based paints. In addition, gas-flow regulators and meters on both water and gas heating systems constructed prior to 1961 must be carefully evaluated to determine that they do not contain dangerous substances such as mercury. Mercury can be harmful to humans and the environment if it is spilled during the removal of these devices. In paragraph 1, the author implies that _____________ .

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT Quốc gia môn Sinh có đáp án (Đề số 17)

Trong các phát biểu sau, có bao nhiêu phát biểu đúng ? (1) Khi riboxom tiếp xúc với mã 5’UGA3' trên mARN thì quá trình dịch mã dừng lại. (2) Trên mỗi phân tử mARN có thể có nhiều riboxom cùng thực hiện quá trình dịch mã. (3) Khi thực hiện quá trình dịch mã, riboxom dịch chuyển theo chiều 3'→5' trên phân tử mARN. (4) Mỗi phân tử tARN có một đến nhiều anticodon

Sinh học Tốt nghiệp THPT
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Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 6)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (1) _______ ecosystems. If there is too (2) _______ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for he pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal and lets the seeds (3) _______. Polluting the air, soil, and water can harm ecosystems. Building (4) _______ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and governments to find better ways of (5) _______ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems. Điền vào ô trống 1

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25 Bộ đề Ôn luyện thi THPTQG môn Sinh Học cực hay có lời giải (Đề số 17)

Khi nói đến thuyết tiến hoá nhỏ, có bao nhiêu phát biểu nào dưới đây sai? I.                   Tiến hoá nhỏ là quá trình biến đổi tần số alen và tần số kiểu gen của quần thể qua các thê hệ. II.                Tiến hoá nhỏ là quá trình biển đổi vốn gen của quần thể qua thời gian. III.             Tiến hoá nhỏ diễn ra trong thời gian địa chất lâu dài và chỉ có thể nghiên cứu gián tiếp. Tiến hoá nhỏ diễn ra trong thời gian lịch sử tương đối ngắn, phạm vi tương đối hẹp

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Tổng hợp đề thi thử THPT Quốc gia môn Sinh có đáp án (Đề số 17)

Trong các nội dung sau đây, có bao nhiêu nội dung đúng? I. Nước tự do không bị hút bởi các phân tử tích điện hay dạng liên kết hóa học II. Trong hai dạng nước tự do và nước liên kết, thực vật dễ sử dụng nước liên kết hơn. III. Nước tự do giữ được tính chất vật lí, hóa học, sinh học bình thường của nước nên có vai trò rất quan trọng đối với cây. IV. Nước tự do không giữ được các đặc tính vậy lí, hóa học, sinh học của nước nhưng có vai trò đảm bảo độ bền vững của hệ thống keo trong chất nguyên sinh

Sinh học Tốt nghiệp THPT
Xem chi tiết 500 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   The concept of being environmentally conscious, or “green,” has become more prevalent in twenty first-century U.S. culture. It has begun to affect the manufacturing of everything from non-toxic household cleaning products to motor vehicles powered by alternative sources of energy. However, one way of being “green” that is perhaps not as apparent to the viewer but of equal importance in being environmentally conscious, is the construction of buildings that are considered “sustainable.” Sustainable buildings are those that do not impose on the environment or rely on the over-utilization of energy or natural resources. There are four main principles of sustainability, which include consideration of the health and stability of all living things and their environmental diversity, as well as the economic opportunities of humanity.   Sustainable architecture consists of environmentally conscious design techniques. In the past, the demolition of an old building meant that all or most of the debris of the building would end up in a landfill or a waste disposal site. Today, architects can plan and design a building that uses recycled materials, such as wood, concrete, stone, or metal. These materials are salvaged from the demolition of an older building and can be appropriately incorporated into a new construction. Architects and construction supervisors may also choose to recycle more organic parts of demolished buildings, such as wooden doors, windows and other glass, ceramics, paper, and textiles.   A problem that has often arisen has been with how a site crew-whether it is demolition or construction crew determines and sorts what is “waste” and what is recyclable. Architects and environmental scientists have to decide whether or not a material is appropriate for use in new construction and how it will impact the environment. They must evaluate the materials from the demolition and determine what those materials contain, and if they meet the standards set by the U.S. government’s Environmental Protection Agency (the EPA). If the debris from the demolition contains hazardous materials that are harmful to the environment or to the consumer, such as asbestos, then the material is not salvageable. Use of asbestos for insulation and as a form of fire retardation in buildings and fabrics was common in the nineteenth century. Asbestos was once used in shingles on the sides of old buildings, as well as in the insulation in the interior walls of homes or other construction. In new “green” construction, insulation that was once asbestos-based can be replaced with recycled denim or constructed with cellulose-a fibrous material found in paper products. The same assessment applies to wood or wallboard painted with toxic lead-based paints. In addition, gas-flow regulators and meters on both water and gas heating systems constructed prior to 1961 must be carefully evaluated to determine that they do not contain dangerous substances such as mercury. Mercury can be harmful to humans and the environment if it is spilled during the removal of these devices. The word “prevalent” in paragraph 1 is closest in meaning to _____________ .

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 826 lượt xem 6 năm trước
Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 14)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 36 to 42. Life originated in the early seas less than a billion years after the Earth was formed. Yet another three billions years were to pass before the first plants and animals appeared on the continents. Life's transition from the sea to the land was perhaps as much of an evolutionary challenge as was the genesis of life. What forms of life were able to make such a drastic change in lifestyle? The traditional view of the first terrestrial organisms is based on megafossils - relatively large specimens of essential whole plants and animals. Vascular plants, related to modern seed plants and ferns, left the first comprehensive megafossil record. Because of this, it has been commonly assumed that the sequence of terrestrialization reflected the evolution of 10 modern terrestrial ecosystems. In this view, primitive vascular plants first colonized the margins of continental waters, followed by animals that fed on the plants, and lastly by the animals that preyed on the plant-eaters. Moreover, the megafossils suggest that terrestrial life appeared and diversified explosively near the boundary between the Silurian and the Devonian periods, a little more than 400 million years ago. Recently, however, paleontologists have been taking a closer look at sediments below this Silurian- Devonian geological boundary. It turns out that some fossils can be extracted from these sediments by putting the rock in an acid bath. The technique has uncovered new evidence from sediments that were deposited near the shores of the ancient oceans - plant microfossils and microscopic pieces of small animals. In many instances, the specimens are less than one-tenth of a millimeter in diameter. Although they were entombed in the rocks for hundreds of millions of years, many of the fossils consist of the organic remains of the organism. These discovered fossils have not only revealed the existence ofpreviously unknown organisms, but have also pushed back these dates for the invasion of land by multicellular organisms. Our view about the nature of the early plants and animal communities are now being revised. And with those revisions come new speculations about the first terrestrial life-forms. Question 40: The word "they" refers to ______.

Tiếng Anh Tốt nghiệp THPT
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Bài luyện tập số 3

Xét phản ứng: HCl + KMnO4 → Cl2 + MnCl2 + H2O + KCl. Trong phản ứng này vai trò của HCl là:

Hóa học Lớp 10
Xem chi tiết 19.6 K lượt xem 6 năm trước
Tổng hợp đề thi thử THPT Quốc gia môn Sinh có đáp án (Đề số 17)

Ở gà, gen quy định màu sắc lông nằm trên vùng không tương đồng của nhiễm sắc thể giới tính X có hai alen, alen A quy định lông vằn trội hoàn toàn so với alen a quy định lông không vằn. Gen quy định chiều cao chân nằm trên nhiễm sắc thể thường có 2 alen, alen B quy định chân cao trội hoàn toàn so với alen b quy định chân thấp. Cho gà trống lông vằn, chân thấp thuần chủng giao phối với gà mái lông không vằn, chân cao thuần chủng thu được F1. Cho F1 giao phối với nhau để tạo ra F2. Dự đoán nào sau đây về kiểu hình ở F2 là đúng?

Sinh học Tốt nghiệp THPT
Xem chi tiết 788 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   Although speech is the most advanced form of communication, there are many ways of communicating without using speech. Signals, signs, symbols, and gestures may be found in every known culture. The basic function of signal is to impinge upon the environment in such a way that it attracts attention, for example, the dots and dashes of a telegraph circuit. Coded to refer to speech, the potential for communication is really great. Less adaptable to the codification of words, signs also contain meaning in and of themselves. A stop sign or barber pole conveys meaning quickly and conveniently. Symbols are more difficult to describe than either signals or signs because of their intricate relationship with the receiver’s cultural perceptions. In some culture, applauding in a theater provides performers with an auditory’ symbol of approval. Gestures such as waving and handshaking also convey certain cultural messages.   Although signals, signs, symbols, and gestures are very useful, they do have a major disadvantage. They usually do not allow ideas to be shared without the sender being directly adjacent to the receiver. As a result, means of communication intended to be used for long distances and extended periods are based upon speech. Radio, television, and the telephone are only a few. Why were the telephone, radio, and the television invented?

Tiếng Anh Tốt nghiệp THPT
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25 Bộ đề Ôn luyện thi THPTQG môn Sinh Học cực hay có lời giải (Đề số 17)

Ở người, gen A quy định mắt đen trội hoàn toàn so với gen a quy định mắt xanh. Mẹ và bố phải có kiểu gen và kiều hình như thế nào để con sinh ra có người mắt đen, có người mắt xanh?

Sinh học Tốt nghiệp THPT
Xem chi tiết 1.2 K lượt xem 6 năm trước
Bài luyện tập số 3

Phản ứng nào sau đây không thể xảy ra

Hóa học Lớp 10
Xem chi tiết 11.5 K lượt xem 6 năm trước
Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 14)

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 36 to 42. Life originated in the early seas less than a billion years after the Earth was formed. Yet another three billions years were to pass before the first plants and animals appeared on the continents. Life's transition from the sea to the land was perhaps as much of an evolutionary challenge as was the genesis of life. What forms of life were able to make such a drastic change in lifestyle? The traditional view of the first terrestrial organisms is based on megafossils - relatively large specimens of essential whole plants and animals. Vascular plants, related to modern seed plants and ferns, left the first comprehensive megafossil record. Because of this, it has been commonly assumed that the sequence of terrestrialization reflected the evolution of 10 modern terrestrial ecosystems. In this view, primitive vascular plants first colonized the margins of continental waters, followed by animals that fed on the plants, and lastly by the animals that preyed on the plant-eaters. Moreover, the megafossils suggest that terrestrial life appeared and diversified explosively near the boundary between the Silurian and the Devonian periods, a little more than 400 million years ago. Recently, however, paleontologists have been taking a closer look at sediments below this Silurian- Devonian geological boundary. It turns out that some fossils can be extracted from these sediments by putting the rock in an acid bath. The technique has uncovered new evidence from sediments that were deposited near the shores of the ancient oceans - plant microfossils and microscopic pieces of small animals. In many instances, the specimens are less than one-tenth of a millimeter in diameter. Although they were entombed in the rocks for hundreds of millions of years, many of the fossils consist of the organic remains of the organism. These discovered fossils have not only revealed the existence ofpreviously unknown organisms, but have also pushed back these dates for the invasion of land by multicellular organisms. Our view about the nature of the early plants and animal communities are now being revised. And with those revisions come new speculations about the first terrestrial life-forms. Question 39: The word "extracted" is closest in meaning to ___________.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 1.1 K lượt xem 6 năm trước
Tổng hợp đề thi thử THPT Quốc gia môn Sinh có đáp án (Đề số 17)

Sơ đồ phả hệ sau đây mô tả hai bệnh M và N di truyền ở người. Bệnh  N do gen lặn nằm trên vùng không tương đồng của NST giới tính  X quy định. Biết rằng không có các đột biến mới phát sinh ở tất cả các cá thể trong phả hệ. Xác suất sinh con đầu lòng bị cả hai bệnh của cặp vợ chồng III.12 – III.13 trong phả hệ này là

Sinh học Tốt nghiệp THPT
Xem chi tiết 1.1 K lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 34)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   Although speech is the most advanced form of communication, there are many ways of communicating without using speech. Signals, signs, symbols, and gestures may be found in every known culture. The basic function of signal is to impinge upon the environment in such a way that it attracts attention, for example, the dots and dashes of a telegraph circuit. Coded to refer to speech, the potential for communication is really great. Less adaptable to the codification of words, signs also contain meaning in and of themselves. A stop sign or barber pole conveys meaning quickly and conveniently. Symbols are more difficult to describe than either signals or signs because of their intricate relationship with the receiver’s cultural perceptions. In some culture, applauding in a theater provides performers with an auditory’ symbol of approval. Gestures such as waving and handshaking also convey certain cultural messages.   Although signals, signs, symbols, and gestures are very useful, they do have a major disadvantage. They usually do not allow ideas to be shared without the sender being directly adjacent to the receiver. As a result, means of communication intended to be used for long distances and extended periods are based upon speech. Radio, television, and the telephone are only a few. Applauding was cited as an example of _____________

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 383 lượt xem 6 năm trước
Bài luyện tập số 3

Để chứng minh tính oxi hóa thay đổi theo chiều: F2 > Cl2 > Br2 > I2, ta có thể dùng phản ứng 

Hóa học Lớp 10
Xem chi tiết 15.2 K lượt xem 6 năm trước

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