12. They are those that live on or depend on the bottom like the starfish, those that move ________ of water currents and those that are carried along by the currents. A. independenceB. independent...

T

Truongduy

13 tháng 4 2020

12. They are those that live on or depend on the bottom like the starfish, those that move ________ of water currents and those that are carried along by the currents. A. independenceB. independentC. independentlyD. dependent 13. Some marine animals are _________ to humans. A. dangerB. dangerousC. endangeredD. dangerously 14. You may be surprised at the large ----------- of animals that live in the sea. A. variety B. variously C. various D. vary 15....

Đọc tiếp

12. They are those that live on or depend on the bottom like the starfish, those that move ________ of water currents and those that are carried along by the currents.

A. independenceB. independentC. independentlyD. dependent

13. Some marine animals are _________ to humans.

A. dangerB. dangerousC. endangeredD. dangerously

14. You may be surprised at the large ----------- of animals that live in the sea.

A. variety B. variously C. various D. vary

15. Community police have made a very positive ______ to crime prevention.

A. contributeB. contributiveC. contributionD. contributively

16. They are investigating the ______ disappearance of a young woman.

A. mysteryB. mysteriousC. mysteriouslyD. mysteries

17. By the age of eighteen he was completely ______ of his parents.

A. dependenceB. dependentlyC. dependentD. depend

18. The ______ of the seabed is being carried out.

A. investigateB. investigativeC. investigationD. investigating

19.For centuries, people have been challenged by the ___________ that lie beneath the ocean.

A. mysteryB. mysteriousC. mysteriouslyD. mysteries

20.Dolphin population is at stake due to the _______of their habitats and accidental entrapment in fishing nets.

A. polluteB. pollutiveC. pollutionD. pollutants

21. Nairobi National Park is Kenya’s smallest park, but you may be surprised at the large ______ of animals that live there.

A. varyB. varietyC. variousD. variously

22. Visitors, especially children, can go to Cuc Phuong National Park to learn how to recognize the ---------species of animals and plants.

A. differB. differenceC. differentD. differently

23. This national park is _____ because it has plants and animals from both tropical and temperate zones.

A. specially B. special B. specialize D. specialization

24. The giant panda is in danger of becoming extinct. It is an -------species.

A. dangerousB. dangerously C. endanger D. endangered

25. Trees, grasses, and other plant life play an important part in the _______ circulation of water.

A. natural B. natureC. naturallyD. naturalize

26. Without plants, most water would run off as soon as it falls, taking away ______ soil.

A. valueB. valuableC. valuablyD. values

27. The earth is being threatened and the future looks _______.

A. badB. badlyC. badnessD. worsen

28. Man is _______ doing harm to the environment.

A. constancyB. constantC. constantlyD. constants

29. A campfire near a heap of leaves may _____ cause a forest fire.

A. easeB. easyC. easilyD. eases

30. A gulf is a term that refers to the ________ of different kinds of animals and plants which make a balanced environment.

A. existB. existenceC. existentD. existed

#Tiếng anh lớp 10

0

LQ

Lê Quỳnh Anh

18 tháng 11 2019

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. Recent technological advances in manned and unmanned vehicles, along with breakthroughs in satellite technology and computer equipment, have overcome some of the limitations of divers and diving equipment for scientists doing research on the great oceans of the world. Without a vehicle, divers often became sluggish, and their mental concentration was...

Đọc tiếp

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.

Recent technological advances in manned and unmanned vehicles, along with breakthroughs in satellite technology and computer equipment, have overcome some of the limitations of divers and diving equipment for scientists doing research on the great oceans of the world. Without a vehicle, divers often became sluggish, and their mental concentration was severely limited. Because undersea pressure affects their speech organs, communication among divers has always been difficult or impossible. But today, most oceanographers avoid the use of vulnerable human divers, preferring to reduce the risk to human life and make direct observations by means of instruments that are lowered into the ocean, from samples taken from the water, or from photographs made by orbiting satellites. Direct observations of the ocean floor can be made not only by divers but also by deep-diving submarines in the water and even by the technology of sophisticated aerial photography from vantage points above the surface of more than seven miles and cruise at depths of fifteen thousand feet. In addition, radio-equipped buoys can be operated by remote control in order to transmit information back to land-based laboratories via satellite. Particularly important for ocean study are data about water temperature, currents, and weather. Satellite photographs can show the distribution of sea ice, oil slicks, and cloud formations over the ocean, Maps created from satellite pictures can represent the temperature and the color of the ocean’s surface, enabling researchers to study the ocean currents from laboratories on dry land. Furthermore, computers help oceanographers to collect, organize, and analyze data from submarines and satellites. By creating a model of the ocean’s movement and characteristics, scientists can predict the patterns and possible effects of the ocean on the environment.

Recently, many oceanographers have been relying more on satellites and computers than on research ships or even submarine vehicles because they can supply a greater range of information more quickly and more effectively. Some of humankind’s most serious problems, especially those concerning energy and food, may be solved with the help of observations made possible by this new technology.

The words “those” refers to

A. ships

B. vehicles

C. problems

D. computers

#Mẫu giáo

1

DH

Dương Hoàn Anh

18 tháng 11 2019

Đáp án C.

Key word: those, refers.

Clue: “Some of humankind's most serious problems, especially those concerning energy and food, may be solved with the help of observations made possible by this new technology.”: một trong những vấn đề nghiêm trọng nhất của nhân loại, đặc biệt là những ... liên quan đến năng lượng và thức ăn, có thể được giải quyết với sự giúp sức của việc quan sát qua công nghệ mới này.

Ta thấy từ those liên kết chặt chẽ với từ problems do đó đáp án chính xác là C. problems: vấn đề.

Các đáp án khác không đúng:

A. ships: những con thuyền

B. vehicles: phương tiện di chuyển

D. computers: máy tính

Đúng(0)

LQ

Lê Quỳnh Anh

7 tháng 4 2017

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...

Đọc tiếp

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.

he best fossils are those

A. consist of Calcite and aragonite

B. from hard parts of animals or plants

C. still in the shape of the original animal or plant

D. animals or plants common for fossilization

#Mẫu giáo

1

DH

Dương Hoàn Anh

7 tháng 4 2017

Đáp án là A.

Ý trong bài: 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.

Đúng(0)

LQ

Lê Quỳnh Anh

13 tháng 6 2017

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.The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it...

Đọc tiếp

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.

The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food. Glaciers are a possible source of fresh water that has been overlooked until recently. (A)

Three-quarters of the Earth's fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10,000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica. (B)

Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice, which is formed when the sea itself freezes; rather, they are formed entirely on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. (C)

The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalination, or removing salt from water. (D)

The word “currents” in the third paragraph is closest in meaning to _________.

A. pulls

B. waves

C. weather

D. flows of water

#Mẫu giáo

1

DH

Dương Hoàn Anh

13 tháng 6 2017

Đáp án : D

“currents” = “flows of water”: dòng, luồng chảy của nước

Đúng(0)

LQ

Lê Quỳnh Anh

5 tháng 10 2019

Recent technological advances in manned and unmanned vehicles, along with breakthroughs in satellite technology and computer equipment, have overcome some of the limitations of divers and diving equipment for scientists doing research on the great oceans of the world. Without a vehicle, divers often became sluggish, and their mental concentration was severely limited. Because undersea pressure affects their speech organs, communication among divers has always been difficult or impossible. But...

Đọc tiếp

Recent technological advances in manned and unmanned vehicles, along with breakthroughs in satellite technology and computer equipment, have overcome some of the limitations of divers and diving equipment for scientists doing research on the great oceans of the world. Without a vehicle, divers often became sluggish, and their mental concentration was severely limited. Because undersea pressure affects their speech organs, communication among divers has always been difficult or impossible. But today, most oceanographers avoid the use of vulnerable human divers, preferring to reduce the risk to human life and make direct observations by means of instruments that are lowered into the ocean, from samples take from the water, or from photographs made by orbiting satellites. Direct observations of the ocean floor can be made not only by divers but also by deep-diving submarines in the water and even by the technology of sophisticated aerial photography from vantage points above the surface of more than seven miles and cruise at depths of fifteen thousand feet. In addition, radio-equipped buoys can be operated by remote control in order to transmit information back to land-based laboratories via satellite. Particularly important for ocean study are data about water temperature, currents, and weather. Satellite photographs can show the distribution of sea ice, oil slicks, and cloud formations over the ocean. Maps created from satellite pictures can represent the temperature and the color of the ocean's surface, enabling researchers to study the ocean currents from laboratories on dry land. Furthermore, computers help oceanographers to collect, organize, and analyze data from submarines and satellites. By creating a model of the ocean's movement and characteristics, scientists can predict the patterns and possible effects of the ocean on the environment.

Recently, many oceanographers have been relying more on satellites and computers than on research ships or even submarine vehicles because they can supply a greater range of information more quickly and more effectively. Some of humankind's most serious problems, especially those concerning energy and food, may be solved with the help of observations made possible by this new technology.

The words ‘those” refers to ________.

A. ships

B. vehicles

C. problems

D. computers

#Mẫu giáo

1

DH

Dương Hoàn Anh

5 tháng 10 2019

Đáp án C.

Key word: those, refers.

Clue: “Some of humankind’s most serious problem, especially those concerning energy and food, may be solved with the help of observations made possibly by this new technology.”: một trong những vấn đề nghiêm tọng nhất của nhân loại, đặc biệt là những ... liên quan đến năng lượng và thức ăn, có thể được giải quyết với sự giúp sức của việc quan sát qua công nghê mới này.

Ta thấy từ those liên kết chặt chẽ với từ problems do đó đáp án chính xác là C. problems: vấn đề.

Các đáp án khác không đúng:

A. ships: những con thuyền

B. vehicles: phương tiện di chuyển

D. computers: máy tính

Đúng(0)

LQ

Lê Quỳnh Anh

22 tháng 8 2017

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 36 to 42. The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs...

Đọc tiếp

Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions from 36 to 42.

The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food. Glaciers are a possible source of fresh water that has been overlooked until recently. (A)

Three-quarters of the Earth's fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10,000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica. (B)

Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice, which is formed when the sea itself freezes; rather, they are formed entirely on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. (C)

The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalination, or removing salt from water. (D)

Question 40: The word “currents” in the third paragraph is closest in meaning to ________.

A. pulls

B. waves

C. weather

D. flows of water

#Mẫu giáo

1

DH

Dương Hoàn Anh

22 tháng 8 2017

Đáp án D

Dịch nghĩa: Từ “currents” - dòng ở đoạn 3 gần nghĩa nhất với __________.

A. sự lôi kéo B. sóng C. thời tiết D. dòng nước

Giải thích: Thông tin nằm ở đoạn 2 “As they drift away from the polar region, icebergs pulled by subsurface currents” Khi chúng trôi đi, núi băng ...được kéo đi bởi dòng phía dưới mặt nước, hay rõ nghĩa hơn là dòng nước.

Đúng(0)

LQ

Lê Quỳnh Anh

29 tháng 11 2019

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.The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it...

Đọc tiếp

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.

The concept of obtaining fresh water from iceberg that is towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food. Glaciers are a possible source of fresh water that has been overlooked until recently. (A)

Three-quarters of the Earth's fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10,000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica. (B)

Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice, which is formed when the sea itself freezes; rather, they are formed entirely on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. (C)

The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalination, or removing salt from water. (D)

How are icebergs formed?

A. They break off from glaciers

B. Seawater freezes

C. Rivers freeze

D. Small pieces of floating ice converge

#Mẫu giáo

1

DH

Dương Hoàn Anh

29 tháng 11 2019

Đáp án : A

Thông tin ở đoạn 3: “Icebergs are not like sea ice, which is formed when the sea itself freezes; rather, they are formed entirely on land, breaking off when glaciers spread over the sea.”

Đúng(0)

LQ

Lê Quỳnh Anh

22 tháng 7 2017

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...

Đọc tiếp

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?

A. The swamp environment reduced the amount of bacterial decay

B. Swamp waters contained higher amounts of materials such as calcium carbonate.

C. There were fewer sediments in swamps than in other bodies of water

D. Swamp vegetation accelerated the decomposition of organisms

#Mẫu giáo

1

DH

Dương Hoàn Anh

22 tháng 7 2017

Đáp án là A.

Ý trong bài: The environment of the swaps kept bacterial decay to a minimum.

Đúng(0)

LQ

Lê Quỳnh Anh

30 tháng 4 2019

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...

Đọc tiếp

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.

FAccording to the passage, why were the remains of organisms trapped in swamps better preserved for the fossil record than those that were not?

A. The swamp environment reduced the amount of bacterial decay

B. Swamp waters contained higher amounts of materials such as calcium carbonate

C. There were fewer sediments in swamps than in other bodies of water

D. Swamp vegetation accelerated the decomposition of organisms

#Mẫu giáo

1

DH

Dương Hoàn Anh

30 tháng 4 2019

Chọn đáp án A

Kỹ năng: Đọc

Giải thích:

Câu hỏi: Theo đoạn văn, tại sao hài cốt các sinh vật bị mắc kẹt trong các đầm lầy được bảo quản tốt hơn

Đáp án A: Các môi trường đầm lầy làm giảm số lượng vi khuẩn phân hủy

Thông tin ở câu: “The environment of the swaps kept bacterial decay to a minimum, which greatly aided in the preservation of plants and animals”

Đúng(0)

LQ

Lê Quỳnh Anh

30 tháng 6 2017

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...

Đọc tiếp

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.

The best fossils are those_______

A. consist of Calcite and aragonite

B. from hard parts of animals or plants

C. still in the shape of the original animal or plant

D. animals or plants common for fossilization

#Mẫu giáo

1

DH

Dương Hoàn Anh

30 tháng 6 2017

Chọn đáp án A

Kỹ năng: Đọc

Giải thích:

Câu hỏi: Hóa thạch tốt nhất là ________

Đáp án A: bao gồm Canxi và aragonite

Thông tin ở câu: “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”

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