24春国开电大春西安广播电视大学理工英语1Unit 6 形考成绩单元自测6（10分）参考答案(1)_1

Unit 6 形考成绩_单元自测6（10分）0

Unit 6 形考成绩_单元自测6（10分）0

渝粤题库，我们的目标是要做全覆盖、全正确的答案搜索服务。

试卷总分:100 得分:100

一、选择填空：阅读下面的对话或句子，从A、B、C三个选项中选出一个能填入空白处的最佳选项。

1. — ?A:? ??????????????? ?are the most popular things people buy online?

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— ?B:?Definitely, clothes.?

A. How about?一网一平台答案

B. How do you think渝粤教育

C. What do you think

答案:一网一平台答案

2.— ? ????????????????渝粤题库，我们的目标是要做全覆盖、全正确的答案搜索服务。

— ?I mean the best way is using your own mobile phone or computer to operate it.?

A. How do you think?

B. What do you think?

C. What do you mean?

答案:

3.If he persists? ?????????? ?? awkward ?? questions , then ? send ?him to the ? boss .

A. to be asked

B. to ask

C. in asking

答案:

4.There is no doubt __________Herbert is the most industrious student in our class.

A. that

B. whether

C. what

答案:

5.________ is known to the world, Mark Twain is a great American writer.?

A. As

B. Who

C. That

答案:渝粤搜题

6.二、阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。

Air pollution

People and air pollution are often in the same places. This means that cities with large populations have?the biggest problem of dirty air. Air pollution is caused by many different things. A major kind of air?pollution is the gas from cars. Statistics ( 统计资料 ) show that 93 percent of all auto trips are within cities.

Another major kind of dirty air is the burning of coal and oil for energy. This energy is needed to make?electricity. Of course, much more electricity is used in the city than in the country.

On the average, we throw away more rubbish than the year before. The burning of rubbish makes air?pollution even worse. Many major industries are also responsible for the dirty air in the around cities. The?fumes ( 烟 ) from iron, steel, chemical, and petrol production add particles ( 微粒 )??to the air.

The effects of air pollution range from mild headaches to death. The levels of pollution found in heavy?traffic may cause headaches for loss of clear vision. Wherever coal and oil are used for fuel, fumes may?kill trees and plants and cause metal to corrode ( 腐蚀 ). In some of the larger cities, these fumes endanger?the lives of human beings by contributing to lung diseases and causing early death.

1. The key point of the passage is that .国家开放大学作业答案

A．the cause of air pollution is people

B．the causes and the effects of air pollution are both found in cities

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C．the effects of air pollution range from headaches to death

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2. What is the purpose of this passage?一网一平台答案

A．to persuade people to stop polluting the air

B．to tell the causes of air pollution一网一平台答案

C．to tell why cities are bad places to live

3. Why is air pollution more grave in the city than in the country?

A．Because there are larger populations in cities.

B．Because the air in the city is dirty.国开形成性考核答案

C．Because there are much more gas fumes from cars and burning of coal and oil for energy in the city than in the country.渝粤搜题

4. The fumes from coal and oil may cause metal .渝粤搜题

A．to corrode ???????????B．to twist ??????????????C．to turn black

5. In larger cities, the fumes from coal and oil may contribute to .

A．heart disease ???????B．loss of clear vision ??????????C．lung diseases

(1).

A. A

B. B

C. C国开搜题

答案:

(2).

A. A

B. B

C. C

答案:

(3).国开搜题

A. A

B. B

C. C

答案:

(4).

A. A

B. B

C. C

答案:一网一平台答案渝粤题库

(5).

A. A

B. B

C. C

答案: