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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 10)

Cho các cơ thể có kiểu gen dị hợp 2 cặp gen( mỗi cặp gen quy định một cặp tính trạng) lai với nhau tạo ra 4 loại kiểu hình, trong đó loại kiểu hình lặn về 2 tính trạng chiếm 0,09. Phép lai nào sau đây không giải thích đúng kết quả trên?

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (Đề số 23)

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. Lead poisoning in children is a major health concern. Both low and high doses of paint can have serious effects. Children exposed to high doses of lead often suffer permanent nerve damage, mental retardation, blindness, and even death. Low doses of lead can lead to mild mental retardation, short attention spans, distractibility, poor academic performance, and behavioral problems. This is not a new concern. As early as 1904, lead poisoning in children was linked to lead– based paint. Microscopic lead particles from paint are absorbed into the bloodstream when children ingest flakes of chipped paint, plaster, or paint dust from sanding. Lead can also enter the body through household dust, nailbiting, thumb sucking, or chewing on toys and other objects painted with lead–based paint. Although American paint companies today must comply with strict regulations regarding the amount of lead used in their paint, this source of lead poisoning is still the most common and most dangerous. Children living in older, dilapidated houses are particularly at risk. The word "dilapidated" is closest in meaning to which of the following?

Tiếng Anh Tốt nghiệp THPT
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Bài 19: Địa hình với tác động của nội, ngoại lực

Chọn trong sách giáo khoa Địa lí 8 ba cảnh quan tự nhiên thể hiện các dạng địa hình khác nhau và nêu những yếu tố tự nhiên chính tác động tại nên các cảnh quan trong ảnh?

Địa lý Lớp 8
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30 đề thi thử THPTQG môn Sinh học Cực hay có lời giải (Đề số 24)

Người ta đã sử dụng kĩ thuật nào sau đây để phát hiện sớm bệnh phêninkêto

Sinh học Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Read the following passage and mark the letter A, B, tr or I) to indicate the correct answer to each of the questions from 36 to 42. Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds - any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede fanning. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants. The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them. In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world's weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms. The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season. Question 38: Which of the following terms does the author define in the first paragraph?

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (Đề số 23)

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. Lead poisoning in children is a major health concern. Both low and high doses of paint can have serious effects. Children exposed to high doses of lead often suffer permanent nerve damage, mental retardation, blindness, and even death. Low doses of lead can lead to mild mental retardation, short attention spans, distractibility, poor academic performance, and behavioral problems. This is not a new concern. As early as 1904, lead poisoning in children was linked to lead– based paint. Microscopic lead particles from paint are absorbed into the bloodstream when children ingest flakes of chipped paint, plaster, or paint dust from sanding. Lead can also enter the body through household dust, nailbiting, thumb sucking, or chewing on toys and other objects painted with lead–based paint. Although American paint companies today must comply with strict regulations regarding the amount of lead used in their paint, this source of lead poisoning is still the most common and most dangerous. Children living in older, dilapidated houses are particularly at risk. The word "ingest" could best be replaced by which of the following?

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 14)

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 43 to 50. Learning means acquiring knowledge or developing the ability to perform new behaviors. It is common to think of learning as something that takes place in school, but much of human learning occurs outside the classroom, and people continue to learn throughout their lives. Even before they enter school, young children learn to walk, to talk, and to use their hands to manipulate toys, food, and other objects. They use all of their senses to learn about the sights, sounds, tastes, and smells in their environments. They learn how to interact with their parents, siblings, friends, and other people important to their world. When they enter school, children learn basic academic subjects such as reading, writing, and mathematics. They also continue to learn a great deal outside the classroom. They learn which behaviors are likely to be rewarded and which are likely to be punished. They learn social skills for interacting with other children. After they finish school, people must learn to adapt to the many major changes that affect their lives, such as getting married, raising children, and finding and keeping a job. Because learning continues throughout our lives and affects almost everything we do, the study of learning is important in many different fields. Teachers need to understand the best ways to educate children. Psychologists, social workers, criminologists, and other human-service workers need to understand how certain experiences change people’s behaviors. Employers, politicians, and advertisers make use of the principles of learning to influence the behavior of workers, voters, and consumers. Learning is closely related to memory, which is the storage of information in the brain. Psychologists who study memory are interested in how the brain stores knowledge, where this storage takes place, and how the brain later retrieves knowledge when we need it. In contrast, psychologists who study learning are more interested in behavior and how behavior changes as a result of a person’s experiences. There are many forms of learning, ranging from simple to complex. Simple forms of learning involve a single stimulus. A stimulus is anything perceptible to the senses, such as a sight, sound, smell, touch, or taste. In a form of learning known as classical conditioning, people learn to associate two stimuli that occur in sequence, such as lightning followed by thunder. In operant conditioning, people learn by forming an association between a behavior and its consequences (reward or punishment). People and animals can also learn by observation - that is, by watching others perform behaviors. More complex forms of learning include learning languages, concepts, and motor skills. (Extracted from Microsoft® Student 2009 – DVD Version) The passage mainly discusses ______.

Tiếng Anh Tốt nghiệp THPT
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Bài 19: Địa hình với tác động của nội, ngoại lực

-Sử dụng lược đồ 19.1 và kiến thức đã học, hãy tìm them ba ví dụ cho mỗi dạng địa hình?

Địa lý Lớp 8
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Ôn tập THPTGQ môn Hóa Học cực hay có đáp án (Đề số 8)

Đun nóng chất H2N–CH2–CONH–CH(CH3) –CONH–CH2–COOH trong dung dịch HCl (dư), sau khi các phản ứng kết thúc thu được sản phẩm là:

Hóa học Tốt nghiệp THPT
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ĐẶC ĐIỂM CẤU TẠO, CÔNG THỨC TỔNG QUÁT, DANH PHÁP

Cho các chất có công thức cấu tạo sau đây: (1) CH3CH2COOCH3; (2) CH3OOCCH3;  (3) HCOOC2H5; (4) CH3COC2H5. Chất không thuộc loại este là

Hóa học Tốt nghiệp THPT
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Bài 19: Địa hình với tác động của nội, ngoại lực

- Quan sát các ảnh dưới đây, mô tả hình dạng địa hình trong ảnh và cho biết chúng được hình thành do các tác động nào của ngoại lực?

Địa lý Lớp 8
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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (Đề số 23)

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. Lead poisoning in children is a major health concern. Both low and high doses of paint can have serious effects. Children exposed to high doses of lead often suffer permanent nerve damage, mental retardation, blindness, and even death. Low doses of lead can lead to mild mental retardation, short attention spans, distractibility, poor academic performance, and behavioral problems. This is not a new concern. As early as 1904, lead poisoning in children was linked to lead– based paint. Microscopic lead particles from paint are absorbed into the bloodstream when children ingest flakes of chipped paint, plaster, or paint dust from sanding. Lead can also enter the body through household dust, nailbiting, thumb sucking, or chewing on toys and other objects painted with lead–based paint. Although American paint companies today must comply with strict regulations regarding the amount of lead used in their paint, this source of lead poisoning is still the most common and most dangerous. Children living in older, dilapidated houses are particularly at risk. Which of the following does the passage infer?

Tiếng Anh Tốt nghiệp THPT
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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 10)

Tìm số phát biểu không đúng    1. Đột biến cấu trúc nhiễm sắc thể về bản chất có sự sắp xếp lại trong khối gen chỉ trong một nhiễm sắc thể    2. Đột biến thêm một cặp nucleotit là dễ xảy ra nhất    3. Nếu 5BU là đồng phân của T dẫn tới dạng đột biến thay thế 1 cặp A-T bằng 1 cặp  G-X    4. Phần lớn các đột biến điểm là có hại    5. Đột biến gen xảy ra có tính chất thuận nghịch

Sinh học Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Read the following passage and mark the letter A, B, tr or I) to indicate the correct answer to each of the questions from 36 to 42. Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds - any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede fanning. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants. The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them. In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world's weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms. The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season. Question 37: The word "marring" in bold is closest in meaning to ________.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 14)

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 43 to 50. Learning means acquiring knowledge or developing the ability to perform new behaviors. It is common to think of learning as something that takes place in school, but much of human learning occurs outside the classroom, and people continue to learn throughout their lives. Even before they enter school, young children learn to walk, to talk, and to use their hands to manipulate toys, food, and other objects. They use all of their senses to learn about the sights, sounds, tastes, and smells in their environments. They learn how to interact with their parents, siblings, friends, and other people important to their world. When they enter school, children learn basic academic subjects such as reading, writing, and mathematics. They also continue to learn a great deal outside the classroom. They learn which behaviors are likely to be rewarded and which are likely to be punished. They learn social skills for interacting with other children. After they finish school, people must learn to adapt to the many major changes that affect their lives, such as getting married, raising children, and finding and keeping a job. Because learning continues throughout our lives and affects almost everything we do, the study of learning is important in many different fields. Teachers need to understand the best ways to educate children. Psychologists, social workers, criminologists, and other human-service workers need to understand how certain experiences change people’s behaviors. Employers, politicians, and advertisers make use of the principles of learning to influence the behavior of workers, voters, and consumers. Learning is closely related to memory, which is the storage of information in the brain. Psychologists who study memory are interested in how the brain stores knowledge, where this storage takes place, and how the brain later retrieves knowledge when we need it. In contrast, psychologists who study learning are more interested in behavior and how behavior changes as a result of a person’s experiences. There are many forms of learning, ranging from simple to complex. Simple forms of learning involve a single stimulus. A stimulus is anything perceptible to the senses, such as a sight, sound, smell, touch, or taste. In a form of learning known as classical conditioning, people learn to associate two stimuli that occur in sequence, such as lightning followed by thunder. In operant conditioning, people learn by forming an association between a behavior and its consequences (reward or punishment). People and animals can also learn by observation - that is, by watching others perform behaviors. More complex forms of learning include learning languages, concepts, and motor skills. (Extracted from Microsoft® Student 2009 – DVD Version) Which of the following statements is NOT true according to the passage?

Tiếng Anh Tốt nghiệp THPT
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Bài 19: Địa hình với tác động của nội, ngoại lực

- Quan sát các hình 19.3, 19,4, cho biết nội lực còn tạo ra hiện tượng gì? Nêu một số ảnh hưởng của chúng tới đời sống con người?

Địa lý Lớp 8
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187 Bài trắc nghiệm Hàm số từ đề thi thử THPTQG 2019 cục hay có lời giải(P4)

Cho hàm số y=f(x) liên tục trên ℝ và có đồ thị như hình vẽ dưới đây Tập hợp tất cả các giá trị thực của tham số m để bất phương trình f(4-x2)=m có nghiệm thuộc nửa khoảng [-2;3) là:

Toán Lớp 12
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Đề thi thử THPT Quốc gia năm 2019 Hóa học có lời giải (Đề số 22)

Chất vô cơ X có tính chất sau:     - Tác dụng với dung dịch NaOH (dư) tạo kết tủa;     - Tác dụng được với dung dịch hỗn hợp KMnO4, H2SO4 (loãng). Trong số các chất Fe, Al, FeCl3, FeSO4, Ba(HCO3)2, Fe(NO3)3, CuSO4 có bao nhiêu chất thỏa mãn với tính chất của X?

Hóa học Tốt nghiệp THPT
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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 10)

Lai ruồi giấm thuần chủng: cái mắt đỏ-cánh bình thường x đực mắt trắng – cánh xẻà F1 100% mắt đỏ-cánh bình thường. Cho F1xF1à F2: Ruồi ♂ F2: 135 mắt đỏ, cánh bình thường: 135 mắt trắng, cánh xẻ: 15 mắt đỏ, cánh xẻ: 16 mắt trắng, cánh bình thường. Ruồi ♀ F2: 300 mắt đỏ, cánh bình thường. Xác định phép lai ở F1 và tần số hoán vị gen là

Sinh học Tốt nghiệp THPT
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Bài 19: Địa hình với tác động của nội, ngoại lực

- Quan sát các hình 19.1, 19.2 và dựa và kiến thức đã học, cho biết các dãy núi cao, núi lửa của thế giới xuất hiện ở vị trí nào của các mảng kiến tạo?

Địa lý Lớp 8
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 14)

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 43 to 50. Learning means acquiring knowledge or developing the ability to perform new behaviors. It is common to think of learning as something that takes place in school, but much of human learning occurs outside the classroom, and people continue to learn throughout their lives. Even before they enter school, young children learn to walk, to talk, and to use their hands to manipulate toys, food, and other objects. They use all of their senses to learn about the sights, sounds, tastes, and smells in their environments. They learn how to interact with their parents, siblings, friends, and other people important to their world. When they enter school, children learn basic academic subjects such as reading, writing, and mathematics. They also continue to learn a great deal outside the classroom. They learn which behaviors are likely to be rewarded and which are likely to be punished. They learn social skills for interacting with other children. After they finish school, people must learn to adapt to the many major changes that affect their lives, such as getting married, raising children, and finding and keeping a job. Because learning continues throughout our lives and affects almost everything we do, the study of learning is important in many different fields. Teachers need to understand the best ways to educate children. Psychologists, social workers, criminologists, and other human-service workers need to understand how certain experiences change people’s behaviors. Employers, politicians, and advertisers make use of the principles of learning to influence the behavior of workers, voters, and consumers. Learning is closely related to memory, which is the storage of information in the brain. Psychologists who study memory are interested in how the brain stores knowledge, where this storage takes place, and how the brain later retrieves knowledge when we need it. In contrast, psychologists who study learning are more interested in behavior and how behavior changes as a result of a person’s experiences. There are many forms of learning, ranging from simple to complex. Simple forms of learning involve a single stimulus. A stimulus is anything perceptible to the senses, such as a sight, sound, smell, touch, or taste. In a form of learning known as classical conditioning, people learn to associate two stimuli that occur in sequence, such as lightning followed by thunder. In operant conditioning, people learn by forming an association between a behavior and its consequences (reward or punishment). People and animals can also learn by observation - that is, by watching others perform behaviors. More complex forms of learning include learning languages, concepts, and motor skills. (Extracted from Microsoft® Student 2009 – DVD Version) It can be inferred from the passage that social workers, employers, and politicians concern themselves with the study of learning because they need to ______.

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử THPTQG môn Sinh học Cực hay có lời giải (Đề số 24)

Ứng dụng nào sau đây không dựa trên cơ sở của kĩ thuật di truyền? (1) Dê mang gen quy địnhprotein của tơ nhện (2) Sử dụng vi khuẩn E.coli để sản xuất insulin chữa bệnh đái tháo đường ở người. (3) Tạo chủng nấm Penicilium có hoạt tính penixilin tăng gấp 200 lần dạng ban đầu (4) Tạo bông mang gen có khả năng kháng sâu hại (5) Tạo ra chuột nhắt chứa gen hoocmon sinh trưởng của chuột cống Số phương án đúng là:

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (Đề số 23)

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. Lead poisoning in children is a major health concern. Both low and high doses of paint can have serious effects. Children exposed to high doses of lead often suffer permanent nerve damage, mental retardation, blindness, and even death. Low doses of lead can lead to mild mental retardation, short attention spans, distractibility, poor academic performance, and behavioral problems. This is not a new concern. As early as 1904, lead poisoning in children was linked to lead– based paint. Microscopic lead particles from paint are absorbed into the bloodstream when children ingest flakes of chipped paint, plaster, or paint dust from sanding. Lead can also enter the body through household dust, nailbiting, thumb sucking, or chewing on toys and other objects painted with lead–based paint. Although American paint companies today must comply with strict regulations regarding the amount of lead used in their paint, this source of lead poisoning is still the most common and most dangerous. Children living in older, dilapidated houses are particularly at risk. The phrase "exposed to" in line 2 could best be replaced by which of the following?

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Read the following passage and mark the letter A, B, tr or I) to indicate the correct answer to each of the questions from 36 to 42. Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds - any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede fanning. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants. The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them. In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world's weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms. The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season. Question 36: With what topic does this passage primarily deal?

Tiếng Anh Tốt nghiệp THPT
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Bài 19: Địa hình với tác động của nội, ngoại lực

- Quan sát hình 19.1, đọc tên và nêu vị trí của dãy núi, sơn nguyên, đồng bằng lớn trên các châu lục?

Địa lý Lớp 8
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 14)

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 43 to 50. Learning means acquiring knowledge or developing the ability to perform new behaviors. It is common to think of learning as something that takes place in school, but much of human learning occurs outside the classroom, and people continue to learn throughout their lives. Even before they enter school, young children learn to walk, to talk, and to use their hands to manipulate toys, food, and other objects. They use all of their senses to learn about the sights, sounds, tastes, and smells in their environments. They learn how to interact with their parents, siblings, friends, and other people important to their world. When they enter school, children learn basic academic subjects such as reading, writing, and mathematics. They also continue to learn a great deal outside the classroom. They learn which behaviors are likely to be rewarded and which are likely to be punished. They learn social skills for interacting with other children. After they finish school, people must learn to adapt to the many major changes that affect their lives, such as getting married, raising children, and finding and keeping a job. Because learning continues throughout our lives and affects almost everything we do, the study of learning is important in many different fields. Teachers need to understand the best ways to educate children. Psychologists, social workers, criminologists, and other human-service workers need to understand how certain experiences change people’s behaviors. Employers, politicians, and advertisers make use of the principles of learning to influence the behavior of workers, voters, and consumers. Learning is closely related to memory, which is the storage of information in the brain. Psychologists who study memory are interested in how the brain stores knowledge, where this storage takes place, and how the brain later retrieves knowledge when we need it. In contrast, psychologists who study learning are more interested in behavior and how behavior changes as a result of a person’s experiences. There are many forms of learning, ranging from simple to complex. Simple forms of learning involve a single stimulus. A stimulus is anything perceptible to the senses, such as a sight, sound, smell, touch, or taste. In a form of learning known as classical conditioning, people learn to associate two stimuli that occur in sequence, such as lightning followed by thunder. In operant conditioning, people learn by forming an association between a behavior and its consequences (reward or punishment). People and animals can also learn by observation - that is, by watching others perform behaviors. More complex forms of learning include learning languages, concepts, and motor skills. (Extracted from Microsoft® Student 2009 – DVD Version) According to the passage, the study of learning is important in many fields due to ______.

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30 đề thi thử THPTQG môn Sinh học Cực hay có lời giải (Đề số 24)

Giả sử một tế bào sinh tinh có kiểu gen Dd giảm phân bìnhthường và có hoán vị gen giữa alen B và b. Theo lí thuyết, các loại giao tử được tạo ra từ tế bào này là

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Cho các dung dịch: glixerol, anbumin, saccarozơ, glucozơ. Số dung dịch phản ứng với Cu(OH)2 trong môi trường kiềm là

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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. Lead poisoning in children is a major health concern. Both low and high doses of paint can have serious effects. Children exposed to high doses of lead often suffer permanent nerve damage, mental retardation, blindness, and even death. Low doses of lead can lead to mild mental retardation, short attention spans, distractibility, poor academic performance, and behavioral problems. This is not a new concern. As early as 1904, lead poisoning in children was linked to lead– based paint. Microscopic lead particles from paint are absorbed into the bloodstream when children ingest flakes of chipped paint, plaster, or paint dust from sanding. Lead can also enter the body through household dust, nailbiting, thumb sucking, or chewing on toys and other objects painted with lead–based paint. Although American paint companies today must comply with strict regulations regarding the amount of lead used in their paint, this source of lead poisoning is still the most common and most dangerous. Children living in older, dilapidated houses are particularly at risk. What is the main topic of the passage?

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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 10)

Cho 2 quần thể  1 và 2 cùng loài, kích thước quần thể  1 gấp đôi quần thể 2. Quần thể 1 có tần số alen A=0,2, quần thể  2 có tần số alen A=0,3. Nếu có 40%  cá thể của quần thể 1 di cư qua quần thể  2 và 20% cá thể của quần thể  2 di cư qua quần thể  1 thì tần số  alen A của 2 quần thể 1 và 2 lần lượt là

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Chất nào dưới đây vừa phản ứng được với dung dịch HCl vừa phản ứng được với dung dịch NaOH?

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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35. One of the hottest topics on the international development agenda is how to harness the power of International Monetary Fund for the benefit of developing countries. What is sometimes called "the death of distance", brought about by the Internet, allow professional services such as (31) _________ education and training to be provided easily and quickly to (32) _____ areas. Some of the gains can be seen in countries as diverse as India and Morocco, where innovations range from (33)______ government announcements to local craftsmen selling their wares to a (34)     _______ market. But already a huge and expanding digital divide is opening up between developed and developing nations. The major tasks facing world leaders at present is to supply everybody on the planet with clean water, basic education and the drugs needed to fight preventable diseases. Installing a modem in every classroom and linking us to (35) _______ _____  must be a lesser criteria at least. Questions 35

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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 14)

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 43 to 50. Learning means acquiring knowledge or developing the ability to perform new behaviors. It is common to think of learning as something that takes place in school, but much of human learning occurs outside the classroom, and people continue to learn throughout their lives. Even before they enter school, young children learn to walk, to talk, and to use their hands to manipulate toys, food, and other objects. They use all of their senses to learn about the sights, sounds, tastes, and smells in their environments. They learn how to interact with their parents, siblings, friends, and other people important to their world. When they enter school, children learn basic academic subjects such as reading, writing, and mathematics. They also continue to learn a great deal outside the classroom. They learn which behaviors are likely to be rewarded and which are likely to be punished. They learn social skills for interacting with other children. After they finish school, people must learn to adapt to the many major changes that affect their lives, such as getting married, raising children, and finding and keeping a job. Because learning continues throughout our lives and affects almost everything we do, the study of learning is important in many different fields. Teachers need to understand the best ways to educate children. Psychologists, social workers, criminologists, and other human-service workers need to understand how certain experiences change people’s behaviors. Employers, politicians, and advertisers make use of the principles of learning to influence the behavior of workers, voters, and consumers. Learning is closely related to memory, which is the storage of information in the brain. Psychologists who study memory are interested in how the brain stores knowledge, where this storage takes place, and how the brain later retrieves knowledge when we need it. In contrast, psychologists who study learning are more interested in behavior and how behavior changes as a result of a person’s experiences. There are many forms of learning, ranging from simple to complex. Simple forms of learning involve a single stimulus. A stimulus is anything perceptible to the senses, such as a sight, sound, smell, touch, or taste. In a form of learning known as classical conditioning, people learn to associate two stimuli that occur in sequence, such as lightning followed by thunder. In operant conditioning, people learn by forming an association between a behavior and its consequences (reward or punishment). People and animals can also learn by observation - that is, by watching others perform behaviors. More complex forms of learning include learning languages, concepts, and motor skills. (Extracted from Microsoft® Student 2009 – DVD Version) Which of the following can be inferred about the learning process from the passage?

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30 đề thi thử THPTQG môn Sinh học Cực hay có lời giải (Đề số 24)

Với một gen quy định tính trạng, khi lai hoa tím với trắng, F1 có 100% hoa tím, F2 thu được 3 tím: 1 trắng thì trong các cây hoa tím xác suất chọn 1 cây dị hợp là bao nhiêu?

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30 đề thi thử THPTQG môn Sinh học Cực hay có lời giải (Đề số 23)

Nhân tố liên quan đến mật độ và có tác dụng giới hạn kích thước quần thể không phải là

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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 10)

Khi nói về quá trình hình thành loài mới theo quan niệm của thuyết tiến hóa hiện đại, phát biểu nào sau đây không đúng?

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Tổng hợp đề thi thử THPTQG môn Tiếng Anh có đáp án (Đề số 23)

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. LETTER TO THE EDITOR The Prime Minister's comments yesterday on education spending miss the point, as the secondary education system also needs a major overhaul. Firstly, the system only views the weakest learners as having special needs. The brightest and most conscientious students are not encouraged to develop to their full (23)_____. Secondly, there's too much testing and not enough learning. My fifteen–year–old daughter, for example, has just spent the last month or so (24)_____ for exams. These aren't even real, important exams, as her GCSEs will be next year. They're just mock exams. Is the work she's been doing really going to make her more knowledgeable about her subjects, or will she forget it all tomorrow? I suspect the (25)_____. Thirdly, the standard (26)_____ doesn't give students any tuition in developing practical work–related, living and social skills, or in skills necessary for higher education. How many students entering university have the first idea what the difference is between plagiarising someone else's work and (27)_____ good use of someone else's ideas? Shouldn't they have been taught this at school? How many of them are really able to go about selfstudy skill that's essential at university because there are no teachers to tell you what to do – in an efficient way? Indeed, hoe many students graduate from university totally unable to spell even simple English words correctly? The system is letting our children down. Điền vào ô trống 27

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Đề thi thử THPT Quốc gia năm 2019 Hóa học có lời giải (Đề số 22)

Thực hiện thí nghiệm sau:     (a) Sục CO2 từ từ đến dư vào dung dịch Ca(OH)2;     (b) Đun nóng dung dịch NaHCO3 và CaCl2 (có số mol bằng nhau);     (c) Thêm nước dư vào hỗn hợp rắn Na2O và Al2O3 (có số mol bằng nhau);     (d) Thêm dung dịch HCl từ từ đến dư vào dung dịch Na2CO3. Sau khi các phản ứng xảy ra hoàn toàn, số thí nghiệm mà dung dịch sau phản ứng chứa 2 muối là

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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 14)

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 43 to 50. Learning means acquiring knowledge or developing the ability to perform new behaviors. It is common to think of learning as something that takes place in school, but much of human learning occurs outside the classroom, and people continue to learn throughout their lives. Even before they enter school, young children learn to walk, to talk, and to use their hands to manipulate toys, food, and other objects. They use all of their senses to learn about the sights, sounds, tastes, and smells in their environments. They learn how to interact with their parents, siblings, friends, and other people important to their world. When they enter school, children learn basic academic subjects such as reading, writing, and mathematics. They also continue to learn a great deal outside the classroom. They learn which behaviors are likely to be rewarded and which are likely to be punished. They learn social skills for interacting with other children. After they finish school, people must learn to adapt to the many major changes that affect their lives, such as getting married, raising children, and finding and keeping a job. Because learning continues throughout our lives and affects almost everything we do, the study of learning is important in many different fields. Teachers need to understand the best ways to educate children. Psychologists, social workers, criminologists, and other human-service workers need to understand how certain experiences change people’s behaviors. Employers, politicians, and advertisers make use of the principles of learning to influence the behavior of workers, voters, and consumers. Learning is closely related to memory, which is the storage of information in the brain. Psychologists who study memory are interested in how the brain stores knowledge, where this storage takes place, and how the brain later retrieves knowledge when we need it. In contrast, psychologists who study learning are more interested in behavior and how behavior changes as a result of a person’s experiences. There are many forms of learning, ranging from simple to complex. Simple forms of learning involve a single stimulus. A stimulus is anything perceptible to the senses, such as a sight, sound, smell, touch, or taste. In a form of learning known as classical conditioning, people learn to associate two stimuli that occur in sequence, such as lightning followed by thunder. In operant conditioning, people learn by forming an association between a behavior and its consequences (reward or punishment). People and animals can also learn by observation - that is, by watching others perform behaviors. More complex forms of learning include learning languages, concepts, and motor skills. (Extracted from Microsoft® Student 2009 – DVD Version) Getting married, raising children, and finding and keeping a job are mentioned in paragraph 2 as examples of ______.

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập đề thi thử Tiếng Anh cực hay có lời giải (Đề số 8)

Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35. One of the hottest topics on the international development agenda is how to harness the power of International Monetary Fund for the benefit of developing countries. What is sometimes called "the death of distance", brought about by the Internet, allow professional services such as (31) _________ education and training to be provided easily and quickly to (32) _____ areas. Some of the gains can be seen in countries as diverse as India and Morocco, where innovations range from (33)______ government announcements to local craftsmen selling their wares to a (34)     _______ market. But already a huge and expanding digital divide is opening up between developed and developing nations. The major tasks facing world leaders at present is to supply everybody on the planet with clean water, basic education and the drugs needed to fight preventable diseases. Installing a modem in every classroom and linking us to (35) _______ _____  must be a lesser criteria at least. Question 34

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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 10)

Cơ sở vật chất di truyền của cừu Đôly được hình thành ở giai đoạn nào trong quy trình nhân bản?

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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. LETTER TO THE EDITOR The Prime Minister's comments yesterday on education spending miss the point, as the secondary education system also needs a major overhaul. Firstly, the system only views the weakest learners as having special needs. The brightest and most conscientious students are not encouraged to develop to their full (23)_____. Secondly, there's too much testing and not enough learning. My fifteen–year–old daughter, for example, has just spent the last month or so (24)_____ for exams. These aren't even real, important exams, as her GCSEs will be next year. They're just mock exams. Is the work she's been doing really going to make her more knowledgeable about her subjects, or will she forget it all tomorrow? I suspect the (25)_____. Thirdly, the standard (26)_____ doesn't give students any tuition in developing practical work–related, living and social skills, or in skills necessary for higher education. How many students entering university have the first idea what the difference is between plagiarising someone else's work and (27)_____ good use of someone else's ideas? Shouldn't they have been taught this at school? How many of them are really able to go about selfstudy skill that's essential at university because there are no teachers to tell you what to do – in an efficient way? Indeed, hoe many students graduate from university totally unable to spell even simple English words correctly? The system is letting our children down. Điền vào ô trống 26

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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 10)

Có 4 tế bào đều có kiểu genAB/ab Dd EeGgHh tiến hành giảm phân xảy ra trao đổi đoạn theo lí thuyết, tối đa có thể tạo ra bao nhiêu loại giao tử

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Bài 18: Thực hành: Tìm hiểu Lào và Cam-pu-chia

- Sử dụng hình 18.1 và 18.2 để: Nêu tên ngành sản xuất, điều kiện để sản xuất ngành, sản phẩm và phân bố ở Lào hoặc Cam-pu-chia.

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187 Bài trắc nghiệm Hàm số từ đề thi thử THPTQG 2019 cục hay có lời giải(P4)

Cho hàm số f(x) có đồ thị như hình vẽ. Số nghiệm thuộc đoạn -π6;5π6 của phương trình f(2sin x +2) =1

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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 14)

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 43 to 50. Learning means acquiring knowledge or developing the ability to perform new behaviors. It is common to think of learning as something that takes place in school, but much of human learning occurs outside the classroom, and people continue to learn throughout their lives. Even before they enter school, young children learn to walk, to talk, and to use their hands to manipulate toys, food, and other objects. They use all of their senses to learn about the sights, sounds, tastes, and smells in their environments. They learn how to interact with their parents, siblings, friends, and other people important to their world. When they enter school, children learn basic academic subjects such as reading, writing, and mathematics. They also continue to learn a great deal outside the classroom. They learn which behaviors are likely to be rewarded and which are likely to be punished. They learn social skills for interacting with other children. After they finish school, people must learn to adapt to the many major changes that affect their lives, such as getting married, raising children, and finding and keeping a job. Because learning continues throughout our lives and affects almost everything we do, the study of learning is important in many different fields. Teachers need to understand the best ways to educate children. Psychologists, social workers, criminologists, and other human-service workers need to understand how certain experiences change people’s behaviors. Employers, politicians, and advertisers make use of the principles of learning to influence the behavior of workers, voters, and consumers. Learning is closely related to memory, which is the storage of information in the brain. Psychologists who study memory are interested in how the brain stores knowledge, where this storage takes place, and how the brain later retrieves knowledge when we need it. In contrast, psychologists who study learning are more interested in behavior and how behavior changes as a result of a person’s experiences. There are many forms of learning, ranging from simple to complex. Simple forms of learning involve a single stimulus. A stimulus is anything perceptible to the senses, such as a sight, sound, smell, touch, or taste. In a form of learning known as classical conditioning, people learn to associate two stimuli that occur in sequence, such as lightning followed by thunder. In operant conditioning, people learn by forming an association between a behavior and its consequences (reward or punishment). People and animals can also learn by observation - that is, by watching others perform behaviors. More complex forms of learning include learning languages, concepts, and motor skills. (Extracted from Microsoft® Student 2009 – DVD Version) According to the passage, what are children NOT usually taught outside the classroom?

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử THPTQG môn Sinh học Cực hay có lời giải (Đề số 23)

  Sự cạnh tranh giữa các cá thể cùng loài sẽ làm  

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30 đề thi thử THPTQG môn Sinh học Cực hay có lời giải (Đề số 24)

Khi nói về nguyên nhân và cơ chế phát sinh đột biến gen, phát biểu nào sau đây không đúng?

Sinh học Tốt nghiệp THPT
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Ôn tập THPTGQ môn Hóa Học cực hay có đáp án (Đề số 8)

Phát biểu nào sau đây sai?

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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. LETTER TO THE EDITOR The Prime Minister's comments yesterday on education spending miss the point, as the secondary education system also needs a major overhaul. Firstly, the system only views the weakest learners as having special needs. The brightest and most conscientious students are not encouraged to develop to their full (23)_____. Secondly, there's too much testing and not enough learning. My fifteen–year–old daughter, for example, has just spent the last month or so (24)_____ for exams. These aren't even real, important exams, as her GCSEs will be next year. They're just mock exams. Is the work she's been doing really going to make her more knowledgeable about her subjects, or will she forget it all tomorrow? I suspect the (25)_____. Thirdly, the standard (26)_____ doesn't give students any tuition in developing practical work–related, living and social skills, or in skills necessary for higher education. How many students entering university have the first idea what the difference is between plagiarising someone else's work and (27)_____ good use of someone else's ideas? Shouldn't they have been taught this at school? How many of them are really able to go about selfstudy skill that's essential at university because there are no teachers to tell you what to do – in an efficient way? Indeed, hoe many students graduate from university totally unable to spell even simple English words correctly? The system is letting our children down. Điền vào ô trống 25

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