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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 1)

Mark the letter A,B,C or D on your answer sheet to show the underlined part that needs correction.(A) Believed that Jack (B) had got home (C) safely , we felt (D) relieved

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 2)

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 following questions. Until recently, hunting for treasure from shipwrecks was mostly fantasy; with recent technological advances, however, the search for sunken treasure has become more popular as a legitimate endeavor. This has caused a debate between those wanting to salvage the wrecks and those wanting to preserve them. Treasure hunters are spurred on by though of finding caches of gold coins or other valuable objects on a sunken ship. One team of salvager, for instance, searched the wreck of the RMS Republic, which sank outside the Boston harbor in 1900. The ! search party, using side-scan sohar, a device that projects sound waves across the ocean bottom and produces a profile of the sea floor, located the wreck in just two and a half days. Before the use of this new technology, such searches could take months or years. The team of 45 divers searched the wreck for two months, finding silver tea services, crystal dinnerware, and thousands of bottles of wine, but they did not find the live and a half tons of American Gold Eagle coins they were searching for. Preservationists focus on the historic value of a ship. They say that even if a shipwreck ‘s ừeasure does not have a high monetary value, it can be an invaluable source of historic artifacts that are preserved in nearly mint condition. But once a salvage team has scoured a site, much of the archaeological value is lost. Maritime archaeogists who are preservationists worry that the success of salvagers will attract more treasure-hunting expeditions and thus threaten remaining undiscovered wrecks. Presevationists are lobbying their state lawmakers to legally restrict underwater searches and unregulated salvages. To counter their efforts, treasure hunters argue that without the lure of gold and million-dolar treasures, the wrecks and their historical artifacts would never be recovered at all. Question: From the passage, you can infer that a preservationist would be most likely to

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

Các nhà khoa học cho rằng trong quá trình phát sinh sự sống, ARN là vậtchất mang thông tin di truyền chứ không phải là ADN. Cơ sở để đưa ra nhậnđịnh này là

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử Tiếng Anh có lời giải (Đề số 2)

Mark the letter A, B, C, or D on your answer sheet to indicate the part which needs correcting (A) Being the only child in the family, Mary (B) always tries (C) to help her mother (D) about household chores.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 1)

Mark the letter A,B,C or D on your answer sheet to show the underlined part that needs correction.We(A) really enjoyed the (B) children’s (C) imaginative and (D) excited play last Saturday.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử đại học nâng cao sinh học có lời giải chi tiết (Đề số 1)

Phép lai thu được F1. Biết rằng mỗi gen quy định một tính trạng, alen trội là trội hoàn toàn và không xảy ra đột biến. Theo lí thuyết, có bao nhiêu phát biểu sau đây về F1 là đúng? I. Nếu không xảy ra hoán vị gen thì có tối đa 16 loại kiểu gen, 9 loại kiểu hình. II. Nếu chỉ có hoán vị gen ở quá trình giảm phân của cơ thể cái thì có tối đa 21 loại kiểu gen, 12 loại kiểu hình. III. Nếu xảy ra hoán vị gen ở cả đực và cái thì có tối đa 30 loại kiểu gen, 12 loại kiểu hình. IV. Nếu chỉ có hoán vị gen ở quá trình giảm phân của cơ thể đực thì có tối đa 24 loại kiểu gen, 12 loại kiểu hình.

Sinh học Lớp 12
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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 24)

Cơ quan tương tự là những cơ quan

Sinh học Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 2)

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 following questions. Until recently, hunting for treasure from shipwrecks was mostly fantasy; with recent technological advances, however, the search for sunken treasure has become more popular as a legitimate endeavor. This has caused a debate between those wanting to salvage the wrecks and those wanting to preserve them. Treasure hunters are spurred on by though of finding caches of gold coins or other valuable objects on a sunken ship. One team of salvager, for instance, searched the wreck of the RMS Republic, which sank outside the Boston harbor in 1900. The ! search party, using side-scan sohar, a device that projects sound waves across the ocean bottom and produces a profile of the sea floor, located the wreck in just two and a half days. Before the use of this new technology, such searches could take months or years. The team of 45 divers searched the wreck for two months, finding silver tea services, crystal dinnerware, and thousands of bottles of wine, but they did not find the live and a half tons of American Gold Eagle coins they were searching for. Preservationists focus on the historic value of a ship. They say that even if a shipwreck ‘s ừeasure does not have a high monetary value, it can be an invaluable source of historic artifacts that are preserved in nearly mint condition. But once a salvage team has scoured a site, much of the archaeological value is lost. Maritime archaeogists who are preservationists worry that the success of salvagers will attract more treasure-hunting expeditions and thus threaten remaining undiscovered wrecks. Presevationists are lobbying their state lawmakers to legally restrict underwater searches and unregulated salvages. To counter their efforts, treasure hunters argue that without the lure of gold and million-dolar treasures, the wrecks and their historical artifacts would never be recovered at all. Question: Which of the following is closest in meaning to the word “legitimate”?

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

Khi nói về thoái hoá giống, phát biểu nào sau đây là đúng?

Sinh học Tốt nghiệp THPT
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Đề minh hoạ kỳ thi THPTQG 2019 môn Hoá học có đáp án (Đề 18)

Đốt cháy hoàn toàn 7,576 gam hỗn hợp các este thuần chức bằng O2 dư, sau khi kết thúc phản ứng thấy thu được 0,25 mol H2O và CO2. Đem toàn bộ sản phẩm cháy hấp thụ hết vào dung dịch nước vôi trong dư thấy có m gam kết tủa xuất hiện. Mặt khác, khi cho 7,576 gam hỗn hợp este này tham gia phản ứng với NaOH thì thấy có 0,1 mol NaOH phản ứng. Giá trị của m là

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử Tiếng Anh có lời giải (Đề số 2)

Mark the letter A, B, C, or D on your answer sheet to indicate the part which needs correcting (A) Well though he (B) makes at school, he hardly seems to be (C) satisfied (D) with the results.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 1)

Read the following passage and mark the letter A,B,C or D on your answers sheet to indicate the correct answer to each of the questions.Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators or decayed by bacteria. Even hard parts left on the surface for any length of time will be destroyed, therefore, organisms must be buried rapidly to escape destruction by the elements and to be protected against agents of weathering and erosion. Marine organisms thus are better candidates for fossilization than those living on the land because the ocean is typical the site of sedimentation, whereas the land is largely the site of erosion.The beds of ancient lakes were also excellent sites for rapid burial of skeletal remains of freshwater organisms and skeletons of other animals, including those of early humans, Ancient swaps were particularly plentiful with prolific growths of vegetation, which fossilized in abundance. Many animals became trapped in bogs overgrown by vegetation. The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals. The rapidly accumulating sediments in flood plains, deltas, and stream channels buried freshwater organisms, along with other plants and animals that happened to fall into the water.Only a small traction of all the organisms that have ever lived are preserved as fossils. Normally, the remains of a plant or animal are completely destroyed through predation and decay. Although it seems that fossilization is common for some organisms, for others it is almost impossible. For the most part of, the remains of organisms are recycled in the earth, which is fortunate because otherwise soil and water would soon became depleted of essential nutrients. Also, most of the fossils exposed on Earth’s surface are destroyed by weathering processes. This make for an incomplete fossil record with poor or no representation of certain species. The best fossils are those composed of that form the vast majority of unaltered fossils. Calcite and aragonite also contributed to a substantial number of fossils of certain organisms.According to the passage, why were the remains of organisms trapped in swamps better preserved for the fossil record than those that were not?

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

Một quần thể đang cân bằng di truyền có tần số alen A = 0,4. Theo líthuyết, tần số kiểu gen AA là

Sinh học Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 2)

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 following questions. Until recently, hunting for treasure from shipwrecks was mostly fantasy; with recent technological advances, however, the search for sunken treasure has become more popular as a legitimate endeavor. This has caused a debate between those wanting to salvage the wrecks and those wanting to preserve them. Treasure hunters are spurred on by though of finding caches of gold coins or other valuable objects on a sunken ship. One team of salvager, for instance, searched the wreck of the RMS Republic, which sank outside the Boston harbor in 1900. The ! search party, using side-scan sohar, a device that projects sound waves across the ocean bottom and produces a profile of the sea floor, located the wreck in just two and a half days. Before the use of this new technology, such searches could take months or years. The team of 45 divers searched the wreck for two months, finding silver tea services, crystal dinnerware, and thousands of bottles of wine, but they did not find the live and a half tons of American Gold Eagle coins they were searching for. Preservationists focus on the historic value of a ship. They say that even if a shipwreck ‘s ừeasure does not have a high monetary value, it can be an invaluable source of historic artifacts that are preserved in nearly mint condition. But once a salvage team has scoured a site, much of the archaeological value is lost. Maritime archaeogists who are preservationists worry that the success of salvagers will attract more treasure-hunting expeditions and thus threaten remaining undiscovered wrecks. Presevationists are lobbying their state lawmakers to legally restrict underwater searches and unregulated salvages. To counter their efforts, treasure hunters argue that without the lure of gold and million-dolar treasures, the wrecks and their historical artifacts would never be recovered at all. Question: The word “ sunken” is closest in meaning to which of the following words?

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

Kiểu gen nào sau đây khi giảm phân bình thường sẽ cho 4 loại giao tử?

Sinh học Tốt nghiệp THPT
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Đề minh hoạ kỳ thi THPTQG 2019 môn Hoá học có đáp án (Đề 18)

Cho các amin: C6H5NH2; (CH3)2NH; C2H5NH2; CH3NHC2H5; (CH3)3N; (C2H5)2NH. Số amin bậc 2 là

Hóa học Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 1)

Read the following passage and mark the letter A,B,C or D on your answers sheet to indicate the correct answer to each of the questions.Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators or decayed by bacteria. Even hard parts left on the surface for any length of time will be destroyed, therefore, organisms must be buried rapidly to escape destruction by the elements and to be protected against agents of weathering and erosion. Marine organisms thus are better candidates for fossilization than those living on the land because the ocean is typical the site of sedimentation, whereas the land is largely the site of erosion.The beds of ancient lakes were also excellent sites for rapid burial of skeletal remains of freshwater organisms and skeletons of other animals, including those of early humans, Ancient swaps were particularly plentiful with prolific growths of vegetation, which fossilized in abundance. Many animals became trapped in bogs overgrown by vegetation. The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals. The rapidly accumulating sediments in flood plains, deltas, and stream channels buried freshwater organisms, along with other plants and animals that happened to fall into the water.Only a small traction of all the organisms that have ever lived are preserved as fossils. Normally, the remains of a plant or animal are completely destroyed through predation and decay. Although it seems that fossilization is common for some organisms, for others it is almost impossible. For the most part of, the remains of organisms are recycled in the earth, which is fortunate because otherwise soil and water would soon became depleted of essential nutrients. Also, most of the fossils exposed on Earth’s surface are destroyed by weathering processes. This make for an incomplete fossil record with poor or no representation of certain species. The best fossils are those composed of that form the vast majority of unaltered fossils. Calcite and aragonite also contributed to a substantial number of fossils of certain organisms.According to the passage, an organisms without hard body parts   

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

Trên phân tử ADN có bazơ nitơ timin (T*) trở thành dạng hiếm thì quaquá trình nhân đôi sẽ gây đột biến thay thế cặp A-T thành cặp G-X. Sơ đồ nàosau đây mô tả đúng cơ chế gây đột biến làm thay thế cặp A-T băng cặp G-Xcủa bazơ nitơ dạng hiếm?

Sinh học Tốt nghiệp THPT
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ĐỀ THI THỬ ĐẠI HỌC NÂNG CAO MÔN SINH HỌC (ĐỀ SỐ 6)

Khi nói về sự hình thành loài mới bằng con đường địa lý, có bao nhiêu phát biểu sau đây đúng? I. Hình thành loài bằng con đường địa lí là phương thức hình thành loài có ở cả động vật và thực vật. II. Cách li địa lý là nhân tố tạo điều kiện cho sự phân hoá vốn gen giữa các quần thể trong loài. III. Điều kiện địa lý là nguyên nhân trực tiếp gây ra những biến đổi tương ứng trên cơ thể sinh vật IV. Quá trình hình thành loài mới cần có sự tham gia của các nhân tố tiến hóa.

Sinh học Tốt nghiệp THPT
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151 Bài tập Đồ thị Hóa Học cực hay có đáp án (P4)

Hòa tan hết 37,86 gam hỗn hợp gồm Ba, BaO, Al và Al2O3 vào lượng nước dư, thu được dung dịch X và 0,12 mol khí H2. Cho dung dịch HCl dư vào X, phản ứng được biểu diễn theo đồ thị sau: Giá trị của a là:     

Hóa học Tốt nghiệp THPT
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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 16)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks. The Planets of Jupiter  The largest of the giant gas planets, Jupiter, with a volume 1,300 times greater than Earth’s, contains more than twice the mass of all the other planets combined. It is thought to be a gaseous and fluid planet without solid surfaces, Had it been somewhat more massive, Jupiter might have attained internal temperatures as high as the ignition point for nuclear reactions, and it would have flamed as a star in its own right. Jupiter and the other giant planets are of a low-density type quite distinct from the terrestrial planets: they are composed predominantly of such substances as hydrogen, helium, ammonia, and methane, unlike terrestrial planets. Much of Jupiter’s interior might be in the form of liquid, metallic hydrogen, Normally, hydrogen is a gas, but under pressures of millions of kilograms per square centimeter, which exist in the deep interior of Jupiter, the hydrogen atoms might lock together to form a liquid with the properties of a metal. Some scientists believe that the innermost core of Jupiter might be rocky, or metallic like the core of Earth.  Jupiter rotates very fast, once every 9.8 hours. As a result, its clouds, which are composed largely of frozen and liquid ammonia, have been whipped into alternating dark and bright bands that circle the planet at different speeds in different latitudes. Jupiter’s puzzling Great Red Spot changes size as it hovers in the Southern Hemisphere. Scientists speculate it might be a gigantic hurricane, which because of its large size (the Earth could easily fit inside it), lasts for hundreds of years.      Jupiter gives off twice as much heat as it receives from the Sun. Perhaps this is primeval heat or beat generated by the continued gravitational contraction of the planet. Another star like characteristic of Jupiter is its sixteen natural satellites, which, like a miniature model of the Solar System, decrease in density with distance from rocky moons close to Jupiter to icy moons farther away. If Jupiter were about 70 times more massive, it would have become a star, Jupiter is the best-preserved sample of the early solar nebula, and with its satellites, might contain the most important clues about the origin of the Solar System. Paragraph 3 supports which of the following conclusions?

Tiếng Anh Tốt nghiệp THPT
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Đề minh hoạ kỳ thi THPTQG 2019 môn Hoá học có đáp án (Đề 18)

Một hỗn hợp gồm anđehit acrylic và một anđehit đơn chức X. Đốt cháy hoàn toàn 1,72 gam hỗn hợp trên cần vừa hết 2,296 lít O2 (đktc). Cho toàn bộ sản phẩm cháy hấp thụ hết vào dung dịch Ca(OH)2 dư, thu được 8,5 gam kết tủa. Công thức cấu tạo của X là

Hóa học Tốt nghiệp THPT
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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 24)

Sinh sản vô tính theo hình thức phân mảnh thường gặp ở những nhómđộng vật nào sau đây?

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử THPTQG Hóa Học có lời giải chi tiết (Đề số 7)

Thể tích dung dịch HNO3 1M (loãng) ít nhất cần dùng để hòa tan hoàn toàn 18 gam hỗn hợp gồm Fe và Cu  có tỷ lệ mol  tương ứng 1 : 1 (biết rằng phản ứng tạo sản phẩm khử duy nhất là NO) là

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử Tiếng Anh có lời giải (Đề số 2)

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 When I picked up my book I found that the cover had been torn

Tiếng Anh Tốt nghiệp THPT
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ĐỀ THI THỬ ĐẠI HỌC NÂNG CAO MÔN SINH HỌC (ĐỀ SỐ 6)

Cho con đực thân đen thuần chủng giao phối với con cái thân xám thuần chủng (P), thu được F1 đồng loạt thân xám. Ngược lại, khi cho con đực thân xám thuần chủng giao phối với con cái thân đen thuần chủng (P), thu được F1 đồng loạt thân đen. Phát biểu nào sau đây đúng?

Sinh học Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 1)

Read the following passage and mark the letter A,B,C or D on your answers sheet to indicate the correct answer to each of the questions.Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators or decayed by bacteria. Even hard parts left on the surface for any length of time will be destroyed, therefore, organisms must be buried rapidly to escape destruction by the elements and to be protected against agents of weathering and erosion. Marine organisms thus are better candidates for fossilization than those living on the land because the ocean is typical the site of sedimentation, whereas the land is largely the site of erosion.The beds of ancient lakes were also excellent sites for rapid burial of skeletal remains of freshwater organisms and skeletons of other animals, including those of early humans, Ancient swaps were particularly plentiful with prolific growths of vegetation, which fossilized in abundance. Many animals became trapped in bogs overgrown by vegetation. The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals. The rapidly accumulating sediments in flood plains, deltas, and stream channels buried freshwater organisms, along with other plants and animals that happened to fall into the water.Only a small traction of all the organisms that have ever lived are preserved as fossils. Normally, the remains of a plant or animal are completely destroyed through predation and decay. Although it seems that fossilization is common for some organisms, for others it is almost impossible. For the most part of, the remains of organisms are recycled in the earth, which is fortunate because otherwise soil and water would soon became depleted of essential nutrients. Also, most of the fossils exposed on Earth’s surface are destroyed by weathering processes. This make for an incomplete fossil record with poor or no representation of certain species. The best fossils are those composed of that form the vast majority of unaltered fossils. Calcite and aragonite also contributed to a substantial number of fossils of certain organisms.Why are marine organisms good candidates for fossilization?

Tiếng Anh Tốt nghiệp THPT
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ĐỀ THI THỬ ĐẠI HỌC NÂNG CAO MÔN SINH HỌC (ĐỀ SỐ 6)

Khi nói về hoạt động của opêrôn Lac, phát biểu nào sau đây đúng?

Sinh học Tốt nghiệp THPT
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30 Bộ đề thi thử THPTQG Sinh học cực hay có lời giải (Đề số 24)

Thụ tinh ở thực vật có hoa là

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử Tiếng Anh có lời giải (Đề số 2)

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 Adele tries hard but she doesn't make much progress

Tiếng Anh Tốt nghiệp THPT
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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 2)

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 following questions. Until recently, hunting for treasure from shipwrecks was mostly fantasy; with recent technological advances, however, the search for sunken treasure has become more popular as a legitimate endeavor. This has caused a debate between those wanting to salvage the wrecks and those wanting to preserve them. Treasure hunters are spurred on by though of finding caches of gold coins or other valuable objects on a sunken ship. One team of salvager, for instance, searched the wreck of the RMS Republic, which sank outside the Boston harbor in 1900. The ! search party, using side-scan sohar, a device that projects sound waves across the ocean bottom and produces a profile of the sea floor, located the wreck in just two and a half days. Before the use of this new technology, such searches could take months or years. The team of 45 divers searched the wreck for two months, finding silver tea services, crystal dinnerware, and thousands of bottles of wine, but they did not find the live and a half tons of American Gold Eagle coins they were searching for. Preservationists focus on the historic value of a ship. They say that even if a shipwreck ‘s ừeasure does not have a high monetary value, it can be an invaluable source of historic artifacts that are preserved in nearly mint condition. But once a salvage team has scoured a site, much of the archaeological value is lost. Maritime archaeogists who are preservationists worry that the success of salvagers will attract more treasure-hunting expeditions and thus threaten remaining undiscovered wrecks. Presevationists are lobbying their state lawmakers to legally restrict underwater searches and unregulated salvages. To counter their efforts, treasure hunters argue that without the lure of gold and million-dolar treasures, the wrecks and their historical artifacts would never be recovered at all. Question: What is the main idea of this passage?

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Đề minh hoạ kỳ thi THPTQG 2019 môn Hoá học có đáp án (Đề 18)

Khi tiến hành cracking 22,4 lít (đktc) khí C4H10 thu được hỗn hợp X gồm CH4, C2H6, C2H4, C3H6, C4H8, H2 và C4H10 dư. Đốt cháy hoàn toàn hỗn hợp X thu được x gam CO2 và y gam H2O. Giá trị của x và y lần lượt là

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

Hệ đệm bicacbônat (NaHCO3/ Na2CO3) có vai trò nào sau đây?

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30 đề luyện thi Đại Học môn Tiếng Anh cực hay có lời giải (Đề số 16)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks. The Planets of Jupiter  The largest of the giant gas planets, Jupiter, with a volume 1,300 times greater than Earth’s, contains more than twice the mass of all the other planets combined. It is thought to be a gaseous and fluid planet without solid surfaces, Had it been somewhat more massive, Jupiter might have attained internal temperatures as high as the ignition point for nuclear reactions, and it would have flamed as a star in its own right. Jupiter and the other giant planets are of a low-density type quite distinct from the terrestrial planets: they are composed predominantly of such substances as hydrogen, helium, ammonia, and methane, unlike terrestrial planets. Much of Jupiter’s interior might be in the form of liquid, metallic hydrogen, Normally, hydrogen is a gas, but under pressures of millions of kilograms per square centimeter, which exist in the deep interior of Jupiter, the hydrogen atoms might lock together to form a liquid with the properties of a metal. Some scientists believe that the innermost core of Jupiter might be rocky, or metallic like the core of Earth.  Jupiter rotates very fast, once every 9.8 hours. As a result, its clouds, which are composed largely of frozen and liquid ammonia, have been whipped into alternating dark and bright bands that circle the planet at different speeds in different latitudes. Jupiter’s puzzling Great Red Spot changes size as it hovers in the Southern Hemisphere. Scientists speculate it might be a gigantic hurricane, which because of its large size (the Earth could easily fit inside it), lasts for hundreds of years.      Jupiter gives off twice as much heat as it receives from the Sun. Perhaps this is primeval heat or beat generated by the continued gravitational contraction of the planet. Another star like characteristic of Jupiter is its sixteen natural satellites, which, like a miniature model of the Solar System, decrease in density with distance from rocky moons close to Jupiter to icy moons farther away. If Jupiter were about 70 times more massive, it would have become a star, Jupiter is the best-preserved sample of the early solar nebula, and with its satellites, might contain the most important clues about the origin of the Solar System. It can be inferred from the passage that the appearance of alternating bands circling Jupiter is caused by__________.

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ĐỀ THI THỬ ĐẠI HỌC NÂNG CAO MÔN SINH HỌC (ĐỀ SỐ 6)

Các phân tử ADN ở trong nhân của cùng một tế bào sinh dưỡng thì

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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 1)

Read the following passage and mark the letter A,B,C or D on your answers sheet to indicate the correct answer to each of the questions.Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators or decayed by bacteria. Even hard parts left on the surface for any length of time will be destroyed, therefore, organisms must be buried rapidly to escape destruction by the elements and to be protected against agents of weathering and erosion. Marine organisms thus are better candidates for fossilization than those living on the land because the ocean is typical the site of sedimentation, whereas the land is largely the site of erosion.The beds of ancient lakes were also excellent sites for rapid burial of skeletal remains of freshwater organisms and skeletons of other animals, including those of early humans, Ancient swaps were particularly plentiful with prolific growths of vegetation, which fossilized in abundance. Many animals became trapped in bogs overgrown by vegetation. The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals. The rapidly accumulating sediments in flood plains, deltas, and stream channels buried freshwater organisms, along with other plants and animals that happened to fall into the water.Only a small traction of all the organisms that have ever lived are preserved as fossils. Normally, the remains of a plant or animal are completely destroyed through predation and decay. Although it seems that fossilization is common for some organisms, for others it is almost impossible. For the most part of, the remains of organisms are recycled in the earth, which is fortunate because otherwise soil and water would soon became depleted of essential nutrients. Also, most of the fossils exposed on Earth’s surface are destroyed by weathering processes. This make for an incomplete fossil record with poor or no representation of certain species. The best fossils are those composed of that form the vast majority of unaltered fossils. Calcite and aragonite also contributed to a substantial number of fossils of certain organisms.What is the author’s main point in paragraph 3?

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151 Bài tập Đồ thị Hóa Học cực hay có đáp án (P4)

Cho từ từ dung dịch Ba(OH)2 vào dung dịch chứa Al2(SO4)3 và AlCl3 thì khối lượng kết tủa sinh ra được biểu diễn bằng đồ thị sau. Giá trị của (x + y) gần với giá trị nào nhất sau đây?

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Tổng hợp đề thi thử THPTQG Hóa Học có lời giải chi tiết (Đề số 7)

Dãy gồm các kim loại được xếp theo chiều tính khử tăng dần là

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Khi nói về tiêu hóa ở động vật, phát biểu nào sau đây đúng?

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30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải (Đề số 2)

  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 following questions. It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school. The distinction between schooling and education implied by this remark is important. Education is much more open-ended and all- inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distingguished scientist. Whereas schooling has a certain predictabillity, education quite oftcr produces surprises. A chance conversation with a stranger may lead person to discover how little is known of other religions. People arc engaged in education from infancy on. Education, then it is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one ‘s entire life. Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite condition surrounding the formalized process of schooling. Question: Which of the following is TRUE according to the passage?  

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Tổng hợp đề thi thử Tiếng Anh có lời giải (Đề số 2)

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 “Would you like another cup of tea?", the landlady said to the guest

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Đề minh hoạ kỳ thi THPTQG 2019 môn Hoá học có đáp án (Đề 18)

Điểm giống nhau về cấu tạo giữa tinh bột và xenlulozơ là

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Read the following passage and mark the letter A,B,C or D on your answers sheet to indicate the correct answer to each of the questions.Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators or decayed by bacteria. Even hard parts left on the surface for any length of time will be destroyed, therefore, organisms must be buried rapidly to escape destruction by the elements and to be protected against agents of weathering and erosion. Marine organisms thus are better candidates for fossilization than those living on the land because the ocean is typical the site of sedimentation, whereas the land is largely the site of erosion.The beds of ancient lakes were also excellent sites for rapid burial of skeletal remains of freshwater organisms and skeletons of other animals, including those of early humans, Ancient swaps were particularly plentiful with prolific growths of vegetation, which fossilized in abundance. Many animals became trapped in bogs overgrown by vegetation. The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals. The rapidly accumulating sediments in flood plains, deltas, and stream channels buried freshwater organisms, along with other plants and animals that happened to fall into the water.Only a small traction of all the organisms that have ever lived are preserved as fossils. Normally, the remains of a plant or animal are completely destroyed through predation and decay. Although it seems that fossilization is common for some organisms, for others it is almost impossible. For the most part of, the remains of organisms are recycled in the earth, which is fortunate because otherwise soil and water would soon became depleted of essential nutrients. Also, most of the fossils exposed on Earth’s surface are destroyed by weathering processes. This make for an incomplete fossil record with poor or no representation of certain species. The best fossils are those composed of that form the vast majority of unaltered fossils. Calcite and aragonite also contributed to a substantial number of fossils of certain organisms.It can be inferred that flood plains, deltas, and stream channels are similar in which of the following ways?

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Tổng hợp đề thi thử THPTQG Hóa Học có lời giải chi tiết (Đề số 7)

Cho 5,6 gam Fe vào 200 ml dung dịch Cu(NO3)2 0,5M và HCl 1M thu được khí NO và m gam kết tủa. Xác định m. Biết rằng NO là sản phẩm khử duy nhất của NO-3  và không có khí H2 bay ra

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Khi nói về quá trình quang hợp, phát biểu nào sau đây đúng?

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

Trong các biểu hiện sau đây, biểu hiện nào thuộc về triệu chứng thiếunguyên tố đồng (Cu) của cây?

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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 Impressed as we were by the new cinema, we found it rather expensive

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ĐỀ THI THỬ ĐẠI HỌC NÂNG CAO MÔN SINH HỌC (ĐỀ SỐ 6)

Một số loài chim thường đậu trên lưng và nhặt các loài kí sinh trên cơ thể động vật móng guốc làm thức ăn. Mối quan hệ giữa chim nhỏ và động vật móng guốc nói trên thuộc mối quan hệ

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Đề thi thử THPT Quốc Gia môn Tiếng anh năm 2020 (Đề số 1)

Read the following passage and mark the letter A,B,C or D on your answers sheet to indicate the correct answer to each of the questions.Generally, in order to be preserved in the fossil record, organisms must possess hard body parts such as shells or bones. Soft, fleshy structures are quickly destroyed by predators or decayed by bacteria. Even hard parts left on the surface for any length of time will be destroyed, therefore, organisms must be buried rapidly to escape destruction by the elements and to be protected against agents of weathering and erosion. Marine organisms thus are better candidates for fossilization than those living on the land because the ocean is typical the site of sedimentation, whereas the land is largely the site of erosion.The beds of ancient lakes were also excellent sites for rapid burial of skeletal remains of freshwater organisms and skeletons of other animals, including those of early humans, Ancient swaps were particularly plentiful with prolific growths of vegetation, which fossilized in abundance. Many animals became trapped in bogs overgrown by vegetation. The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals. The rapidly accumulating sediments in flood plains, deltas, and stream channels buried freshwater organisms, along with other plants and animals that happened to fall into the water.Only a small traction of all the organisms that have ever lived are preserved as fossils. Normally, the remains of a plant or animal are completely destroyed through predation and decay. Although it seems that fossilization is common for some organisms, for others it is almost impossible. For the most part of, the remains of organisms are recycled in the earth, which is fortunate because otherwise soil and water would soon became depleted of essential nutrients. Also, most of the fossils exposed on Earth’s surface are destroyed by weathering processes. This make for an incomplete fossil record with poor or no representation of certain species. The best fossils are those composed of that form the vast majority of unaltered fossils. Calcite and aragonite also contributed to a substantial number of fossils of certain organisms.Why does the author mention “aragonite” in the last line?

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Tổng hợp đề thi thử THPTQG Hóa Học có lời giải chi tiết (Đề số 7)

Đốt cháy hoàn toàn m gam FeS2  thu khí SO2 , toàn bộ khí đó được hấp thu hết vào 100 ml dung dịch  chứa NaOH - 1 M và Ba(OH)2 - 1 M thu được 21,7 g kết tủa .  Giá trị của m là

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