24秋国开电大春山东开放大学理工英语1单元自测3（10分）答卷参考答案

单元自测3（10分）答卷

单元自测3（10分）答卷

单元自测3（10分）

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. --- ?We’d be pleased if you could join us for dinner.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。渝粤教育

渝粤题库

--- ?____________________________________国家开放大学作业答案

A. Thank you

B. Yes, I’d be pleased to accept.

C. That’s good

答案:

2.--- ?why not dine out together and go to the movies?渝粤教育

--- ?________________________________________渝粤搜题

A. You deserve that.渝粤教育

B. Sounds like a good idea.

C. ?Thank you.

答案:

3.The bridge ______ two years ago.?

A. built

B. was built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。

C. is built

答案:

4.Li Lei is___ student in our class.

A. tall

B. taller

C. the tallest

答案:

5.Solar cooking is a _______cooking method.

A. convenience一网一平台答案

B. convention

C. convenient

答案:

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。国家开放大学作业答案

国家开放大学作业答案

When Dr. Robert Metcalf first used a solar cooker, the future changed for millions of Africans. He knew that billions of poor people around the world depend on the use of wood for cooking. As they take more and more firewood from wild areas. They are destroying habitats around the world. Wood collection is one reason why many animals have become endangered.

“But sunshine can be an alternative to fire.”?Dr. Metcalf says. Since his first solar cooked meal, he has helped people around the world to use simple new technologies to cook their food.

渝粤搜题

Each morning in villages across East Africa, small children and their mothers wake up and walk several miles to collect firewood to cook their food. It takes much of the day, and the heavy firewood they carry home on their heads lasts only a few days.

This is why Dr. Metcalf spends each summer in Africa. He teaches women and children in villages how to cook with the sun. So far, more than thirty thousand African families now have solar cookers, and?new programs will introduce solar cookers to millions of families.

To find water, women and children may have to walk long distance to dig holes in dry riverbeds or to gather water from streams and shallow wells.

They fill their buckets（桶）and carry them home on their heads. The buckets often weigh as

much as forty pounds. Not only is finding water hard work, but the water is often polluted with

germs（细菌）that make people sick.

Dr. Metcalf and others developed a simple，reusable tool that people can use to make sure their water is safe to drink．The tool is calked a WAPI，which stands for?“Water Pasteurization Indicator”. The pasteurization process is named after Louis Pasteur，who developed it in the 1800s.

1．Why did Metcalf help Africans use solar cookers? 1

A．He wanted to help them to fight poverty．

B．He found it a dangerous job to collect firewood．

渝粤搜题

C．He realized using firewood is not good for the environment．

2．The underlined word?“it”?in the third paragraph probably refers to" 2 "．

渝粤搜题渝粤题库

A．collecting firewood? ?????????????????????????? B．cooking food

C．cooking with the sun? ??????????????????????

一网一平台答案渝粤搜题

3．Each summer Metcalf stays in Africa to 3 ?．

A. do research on water

B. take care of sick people

渝粤题库

C. spread the technique of using solar cookers

4．Water Pasteurization Indicator was developed to 4 ?．

A. kill the bacteria in water

B. honor Louis Pasteur

C. make waste water reusable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。

?5．It can be inferred from tile passage that ? 5 ?．

A．Africans find it hard to learn to use solar cookers

B．women and children in Africa usually lead a hard life

C．the water Africans drink is not clean though it is easy to get

(1).__1__

A. A

B. B

C. C

答案:

(2).__2__

A. A

B. B

C. C

答案:

(3).__3__

A. A

B. B

C. C

答案:

(4).__4__

A. A

B. B

C. C

答案:

(5).__5__

A. A国家开放大学作业答案

B. B

C. C

答案: