K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

XV. Read the passage and answer the question. A carbon footprint is the amount of carbon dioxide (CO2) released into the air by your own energy needs. You need transportation, electricity, food, clothing, and other goods. CO2 is produced by the burning of fossil fuels which is used to provide energy for your homes, by the cars you travel in and by the manufacture and transport of goods you buy. Carbon dioxide is also called greenhouse gas, which causes global warming. That is the reason why...
Đọc tiếp

XV. Read the passage and answer the question.

A carbon footprint is the amount of carbon dioxide (CO2) released into the air by your own energy needs. You need transportation, electricity, food, clothing, and other goods. CO2 is produced by the burning of fossil fuels which is used to provide energy for your homes, by the cars you travel in and by the manufacture and transport of goods you buy.

Carbon dioxide is also called greenhouse gas, which causes global warming. That is the reason why the carbon footprint is a very poweful tool to understand the impact of personal behaviours on global warming. If you want to contribute to stop global warming, the reduction of your personal carbon footprint is essential. Fist, you can reduce your carbon footprint by driving less. When possible, walk or ride a bike to avoid carbon emissions completely or use public transport in order to decrease CO emissions. Second, support using clean energy sources such as wind, solar, geothermal energy and biogas. Finally, reusing or recycling items you no longer use is also a good way to reduce your carbon footprint.

1. What is a carbon footprint?

..............................................................................

2. How is CO2 produced?

..............................................................................

3. What can carbon footprint cause?

.................................................................................

4. What should you do to stop global warming?

..................................................................................

XVI. Read the passage and choose the best answer A, B, C or D to complete the passage.

In many countries in process of industrialization, overcrowded citis present a major problem. The (1) ............ of town is mainly caused by the drift of large numbers of people from the rural areas. The only long-tẻm solution is to make (2)............. in the rural areas more attractive, which would (3)............ people to stay there. This could be achieved by providing incentives for people to go and work in the villages. Moreover, facilities in the rural areas, such as transportation, health and education services should be (4)...........

1. A. population B. popularity C. populous D. overpopulation

2. A. life B. surroundings C. atmosphere D. sights

3. A. insist B. suggest C. encourage D. persuade

4. A. invested B. improved C. impressed D. increased

1
15 tháng 5 2019

XV. Read the passage and answer the question.

A carbon footprint is the amount of carbon dioxide (CO2) released into the air by your own energy needs. You need transportation, electricity, food, clothing, and other goods. CO2 is produced by the burning of fossil fuels which is used to provide energy for your homes, by the cars you travel in and by the manufacture and transport of goods you buy.

Carbon dioxide is also called greenhouse gas, which causes global warming. That is the reason why the carbon footprint is a very poweful tool to understand the impact of personal behaviours on global warming. If you want to contribute to stop global warming, the reduction of your personal carbon footprint is essential. Fist, you can reduce your carbon footprint by driving less. When possible, walk or ride a bike to avoid carbon emissions completely or use public transport in order to decrease CO emissions. Second, support using clean energy sources such as wind, solar, geothermal energy and biogas. Finally, reusing or recycling items you no longer use is also a good way to reduce your carbon footprint.

1. What is a carbon footprint?

A carbon footprint is the amount of carbon dioxide (CO2) released into the air by your own energy needs.

2. How is CO2 produced?

CO2 is produced by the burning of fossil fuels which is used to provide energy for your homes, by the cars you travel in and by the manufacture and transport of goods you buy.

3. What can carbon footprint cause?

It can cause global warming.

4. What should you do to stop global warming?

Driving less, supporting using clean energy sources such as wind, solar, geothermal energy and biogas.

XVI. Read the passage and choose the best answer A, B, C or D to complete the passage.

In many countries in process of industrialization, overcrowded citis present a major problem. The (1) ............ of town is mainly caused by the drift of large numbers of people from the rural areas. The only long-tẻm solution is to make (2)............. in the rural areas more attractive, which would (3)............ people to stay there. This could be achieved by providing incentives for people to go and work in the villages. Moreover, facilities in the rural areas, such as transportation, health and education services should be (4)...........

1. A. population B. popularity C. populous D. overpopulation

2. A. life B. surroundings C. atmosphere D. sights

3. A. insist B. suggest C. encourage D. persuade

4. A. invested B. improved C. impressed D. increased

Read the passage, and then tick the correct answer true (T), or false (F).Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from...
Đọc tiếp

Read the passage, and then tick the correct answer true (T), or false (F).

Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from organic waste, not fracking) into the grid or pipeline to match the amount of power or natural gas your home uses. Bullfrog ensures the energy going into our energy systems - on your behalf -is from clean, green sources. Bullfrog’s green electricity comes from a blend of wind and low-impact hydro power from new Canadian renewable energy facilities, with at least 50 per cent directly from your region.

Energy use is the main reason that causes carbon footprint in Canada.

A. True

B. False

1
13 tháng 9 2018

Đáp án: A

Giải thích: Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint?

Dịch: Bạn có biết rằng sử dụng năng lượng là đóng góp lớn nhất cho lượng khí thải carbon trung bình của nhà ở Canada?

Read the passage, and then tick the correct answer true (T), or false (F).Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from...
Đọc tiếp

Read the passage, and then tick the correct answer true (T), or false (F).

Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from organic waste, not fracking) into the grid or pipeline to match the amount of power or natural gas your home uses. Bullfrog ensures the energy going into our energy systems - on your behalf -is from clean, green sources. Bullfrog’s green electricity comes from a blend of wind and low-impact hydro power from new Canadian renewable energy facilities, with at least 50 per cent directly from your region.

David Suzuki is the CEO of Bullfrog Power.

A. True

B. False

1
28 tháng 5 2017

Đáp án: B

Giải thích: That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change.

Dịch: Đó là lý do tại sao Quỹ David Suzuki và Bullfrog Power đang hợp tác để cung cấp cho bạn một cách nhanh chóng và dễ dàng để chuyển nhà của bạn thành năng lượng gia tộc và là một phần của giải pháp cho biến đổi khí hậu.

Read the passage, and then tick the correct answer true (T), or false (F).Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from...
Đọc tiếp

Read the passage, and then tick the correct answer true (T), or false (F).

Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from organic waste, not fracking) into the grid or pipeline to match the amount of power or natural gas your home uses. Bullfrog ensures the energy going into our energy systems - on your behalf -is from clean, green sources. Bullfrog’s green electricity comes from a blend of wind and low-impact hydro power from new Canadian renewable energy facilities, with at least 50 per cent directly from your region.

The technology uses solar energy to replace natural gases.

A. True

B. False

1
2 tháng 7 2017

Đáp án: A

Giải thích: When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from organic waste, not fracking) into the grid or pipeline to match the amount of power or natural gas your home uses.

Dịch: Khi bạn chọn năng lượng xanh, máy phát điện của Bullfrog đặt điện sạch, tái tạo và / hoặc khí tự nhiên xanh (được sản xuất từ chất thải hữu cơ, không rán) vào lưới điện hoặc đường ống để phù hợp với lượng điện hoặc khí tự nhiên mà nhà bạn sử dụng.

Read the passage, and then tick the correct answer true (T), or false (F).Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from...
Đọc tiếp

Read the passage, and then tick the correct answer true (T), or false (F).

Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from organic waste, not fracking) into the grid or pipeline to match the amount of power or natural gas your home uses. Bullfrog ensures the energy going into our energy systems - on your behalf -is from clean, green sources. Bullfrog’s green electricity comes from a blend of wind and low-impact hydro power from new Canadian renewable energy facilities, with at least 50 per cent directly from your region.

Green energy comes from diesel.

A. True

B. False

1
25 tháng 5 2019

Đáp án: B

Giải thích: Bullfrog’s green electricity comes from a blend of wind and low-impact hydro power from new Canadian renewable energy facilities.

Dịch: Điện xanh Bullfrog sườn đến từ sự pha trộn của gió và thủy điện tác động thấp từ các cơ sở năng lượng tái tạo mới của Canada.

Read the passage, and then tick the correct answer true (T), or false (F).Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from...
Đọc tiếp

Read the passage, and then tick the correct answer true (T), or false (F).

Did you know that energy use is the biggest contributor to fine average Canadian home's carbon footprint? That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change. When you choose green energy, Bullfrog's generators put clean, renewable electricity and/or green natural gas (produced from organic waste, not fracking) into the grid or pipeline to match the amount of power or natural gas your home uses. Bullfrog ensures the energy going into our energy systems - on your behalf -is from clean, green sources. Bullfrog’s green electricity comes from a blend of wind and low-impact hydro power from new Canadian renewable energy facilities, with at least 50 per cent directly from your region.

David Suzuki wants to find a solution to climate change.

A. True

B. False

1
4 tháng 3 2018

Đáp án: A

Giải thích: That's why the David Suzuki Foundation and Bullfrog Power are partnering to offer you a quick and easy way to switch your home to clan energy and be part of the solution to climate change.

Dịch: Đó là lý do tại sao Quỹ David Suzuki và Bullfrog Power đang hợp tác để cung cấp cho bạn một cách nhanh chóng và dễ dàng để chuyển nhà của bạn thành năng lượng gia tộc và là một phần của giải pháp cho biến đổi khí hậu.

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. PHOTOSYNTHESISAlmost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount...
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 following questions.

PHOTOSYNTHESIS

Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.

Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.

In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.

Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.

Advances in Photosynthesis and Respiration, Hardback.1990.

It can be inferred from the passage that the author considers solar energy to be ______.

A. a perfect solution to the energy problem 

B. a permanent and everlasting source of energy

C. useless to most bacteria and algae

D. essential for every organism on earth

1
23 tháng 6 2019

Kiến thức: Đọc hiểu

Giải thích:

Có thể suy ra từ đoạn văn tác giả coi năng lượng mặt trời là ______.

A. một giải pháp hoàn hảo cho vấn đề năng lượng

B. một nguồn năng lượng vĩnh viễn và vĩnh cửu

C. vô dụng với hầu hết các vi khuẩn và tảo

D. cần thiết cho mọi sinh vật trên trái đất

Thông tin: Almost all living things ultimately get their energy from the sun.

Tạm dịch: Hầu như tất cả các sinh vật sống về cơ bản nhận năng lượng từ mặt trời.

Chọn D

* Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 24 to 30.   Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of...
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 from 24 to 30.

  Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.

  Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.                         

  In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.

  Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.

 

(Hooked on TOEFL Reading - LinguaForum

It can be inferred from the passage that the author considers solar energy to be_________.

A. useless to most bacteria and algae 

B. a permanent and everlasting source of energy 

C. a perfect solution to the energy problem 

D. essential for every organism on earth

1
16 tháng 2 2018

       Câu đề bài: Ta có thể suy ra từ đoạn văn rằng tác giả coi năng lượng mặt trời là _________ .

Đáp án D: cần thiết cho mọi sinh vật trên trái đất Các đáp án còn lại:

A. Vô dụng với hầu hết vi khuẩn và tảo

B. Nguồn năng lượng lâu dài và vĩnh cửu

C. Một giải pháp hoàn hảo cho vấn đề năng lượng

Thông tin trong bài:

Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply. - Quá trình quang hợp bắt đầu khi năng lượng mặt trời được hấp thụ bởi các hóa chất gọi là sắc tố quang hợp được chứa trong một sinh vật. Ngoài ra, quang hợp tạo ra khí oxy. Tất cả khí oxy trên trái đất, cả trong khí quyển chúng ta hít thở và trong đại dương, được sinh ra bởi các sinh vật quang hợp. Quang hợp liên tục bổ sung nguồn cung cấp oxy của trái đất

* Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 24 to 30.  Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of...
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 from 24 to 30.

  Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.

  Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.                                                        

  In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.

  Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.

(Hooked on TOEFL Reading - LinguaForum)

It can be inferred from the passage that the author considers solar energy to be_________.

A. useless to most bacteria and algae

B. a permanent and everlasting source of energy

C. a perfect solution to the energy problem

D. essential for every organism on earth

1
10 tháng 12 2017

ĐÁP ÁN D

Câu đề bài: Ta có thể suy ra từ đoạn văn rằng tác giả coi năng lượng mặt trời là _________ .

Đáp án D: cần thiết cho mọi sinh vật trên trái đất Các đáp án còn lại:

A. Vô dụng với hầu hết vi khuẩn và tảo

B. Nguồn năng lượng lâu dài và vĩnh cửu

C. Một giải pháp hoàn hảo cho vấn đề năng lượng

Thông tin trong bài:

Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply. - Quá trình quang hợp bắt đầu khi năng lượng mặt trời được hấp thụ bởi các hóa chất gọi là sắc tố quang hợp được chứa trong một sinh vật. Ngoài ra, quang hợp tạo ra khí oxy. Tất cả khí oxy trên trái đất, cả trong khí quyển chúng ta hít thở và trong đại dương, được sinh ra bởi các sinh vật quang hợp. Quang hợp liên tục bổ sung nguồn cung cấp oxy của trái đất

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 24 to 30.  Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of...
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 from 24 to 30.

  Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.

  Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.                       

  In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.

  Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.

 

It can be inferred from the passage that the author considers solar energy to be_________.

A. useless to most bacteria and algae

B. a permanent and everlasting source of energy

C. a perfect solution to the energy problem

D. essential for every organism on earth

1
9 tháng 2 2018

Chọn D

Câu đề bài: Ta có thể suy ra từ đoạn văn rằng tác giả coi năng lượng mặt trời là _________ .

Đáp án D: cần thiết cho mọi sinh vật trên trái đất Các đáp án còn lại:

A. Vô dụng với hầu hết vi khuẩn và tảo

B. Nguồn năng lượng lâu dài và vĩnh cửu

C. Một giải pháp hoàn hảo cho vấn đề năng lượng

Thông tin trong bài:

Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply. - Quá trình quang hợp bắt đầu khi năng lượng mặt trời được hấp thụ bởi các hóa chất gọi là sắc tố quang hợp được chứa trong một sinh vật. Ngoài ra, quang hợp tạo ra khí oxy. Tất cả khí oxy trên trái đất, cả trong khí quyển chúng ta hít thở và trong đại dương, được sinh ra bởi các sinh vật quang hợp. Quang hợp liên tục bổ sung nguồn cung cấp oxy của trái đất