Many of the beautiful buildings in our cities ______ by exhaust gases from cars and factories. We must do something to stop this. A. were destroyed B. are destroyed C. are being destroyed D. have been...

Đáp án C Kiến thức: Thì trong tiếng anh Giải thích: Sự việc bị tàn phá vẫn chưa kết thúc, nên không thể dùng quá khứ đơn => A loại Trong câu không có thời điểm xác định sự việc bắt đầu trong quá khứ, nên ko dùng thì hiện tại hoàn thành => D loại Ta dùng thì hiện tại tiếp diễn nhấn mạnh việc đang diễn ra. Tạm dịch: Nhiều tòa nhà đẹp ở các thành phố của chúng ta đang bị phá hủy bởi khí thải từ xe hơi và nhà máy. Chúng ta phải làm gì đó để ngăn chặn điều này.Câu trả lời: Đáp án C Kiến thức: Thì trong tiếng anh Giải thích: Sự việc bị tàn phá vẫn chưa kết thúc, nên không thể dùng quá khứ đơn => A loại Trong câu không có thời điểm xác định sự việc bắt đầu trong quá khứ, nên ko dùng thì hiện tại hoàn thành => D loại Ta dùng thì hiện tại tiếp diễn nhấn mạnh việc đang diễn ra. Tạm dịch: Nhiều tòa nhà đẹp ở các thành phố của chúng ta đang bị phá hủy bởi khí thải từ xe hơi và nhà máy. Chúng ta phải làm gì đó để ngăn chặn điều này.

Many of the beautiful buildings in our cities ______ by exhaust gases from cars and factories. We must do something to s...

LQ

Lê Quỳnh Anh

1 tháng 11 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 word “aided ” in the second paragraph is closest in meaning to

A. counted

B. reformed

C. reversed

D. helped

#Mẫu giáo

1

DH

Dương Hoàn Anh

1 tháng 11 2017

Đáp án là D.

aid = help: giúp ...

Nghĩa các từ còn lại: count: đếm; reverse: duy trì; reform:cải cách

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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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LQ

Lê Quỳnh Anh

6 tháng 1 2018

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.

Why are marine organisms good candidates for fossilization?

A. It take longer for them to be preserved

B. They have more fleshy structures than land organisms

C. The water environment speeds the decay caused by bacteria

D. It is likely that they will be buried rapidly

#Mẫu giáo

1

DH

Dương Hoàn Anh

6 tháng 1 2018

Chọn đáp án B

Kỹ năng: Đọc

Giải thích:

Câu hỏi: Tại sao sinh vật dưới biển lại là ứng cử viên tốt cho sự hóa thạch?

Đáp án B: Chúng có cấu trúc thịt dày hơn các loài trên mặt đất

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LQ

Lê Quỳnh Anh

5 tháng 5 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.

Why are marine organisms good candidates for fossilization?

A. It take longer for them to be preserved

B. They have more fleshy structures than land organisms

C. The water environment speeds the decay caused by bacteria

D. It is likely that they will be buried rapidly

#Mẫu giáo

1

DH

Dương Hoàn Anh

5 tháng 5 2019

Đáp án là B.

Ý trong bài: 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. => phải có cấu trúc thịt dày hơn thì mới khó bị phân hủy => “marine organisms” trở thành “good candidates”

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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.

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LQ

Lê Quỳnh Anh

3 tháng 10 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 word ”agents” is closest in meaning to

A. examples

B. causes

C. areas

D. dangers

#Mẫu giáo

1

DH

Dương Hoàn Anh

3 tháng 10 2017

Đáp án là D.

agents = dangers: mối nguy hiểm

Nghĩa các từ còn lại: examples: các ví dụ; causes: những nguyên nhân; areas: các khu vực

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LQ

Lê Quỳnh Anh

16 tháng 7 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.

The word “agents” is closest in meaning to ________

A. examples

B. causes

C. areas

D. dangers

#Mẫu giáo

1

DH

Dương Hoàn Anh

16 tháng 7 2019

Chọn đáp án D

Kỹ năng: Đọc

Giải thích:

Câu hỏi: Từ “agents” đồng nghĩa với từ:

Đáp án D: dangers: nguy hiểm

Các đáp án khác:

Examples: ví dụ

Causes: nguyên nhân

Areas: khu vực

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LQ

Lê Quỳnh Anh

23 tháng 5 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.

Why does the author mention “aragonite” in the last line?

A. To argue that certain fossils are more informative than others.

B. to explain why fossils are rare

C. To illustrate the kinds of inorganic hard parts that can form fossils

D. To compare aragonite fossils and calcite fossils.

#Mẫu giáo

1

DH

Dương Hoàn Anh

23 tháng 5 2017

Chọn đáp án C

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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LQ

Lê Quỳnh Anh

20 tháng 5 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.

Why does the author mention “aragonite” in the last line?

A. To argue that certain fossils are more informative than other

B. To explain why fossils are rare

C. To illustrate the kinds of inorganic hard parts that can form fossils

D. To compare aragonite fossils and calcite fossils.

#Mẫu giáo

1

DH

Dương Hoàn Anh

20 tháng 5 2019

Đáp án là C.

Để minh họa các loại phần cứng vô cơ có thể tạo thành hóa thạch

aragonite : là tên chất khoáng aragonit

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. ( Các hóa thạch tốt nhất là những thứ bao gồm phần lớn hình dạng các hóa thạch không thay đổi gì. Canxit và aragonit cũng đóng góp vào một số lượng đáng kể các hóa thạch của sinh vật nhất định. )

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