24春国开电大青海广播电视大学理工英语3unit7单元自测7（预备知识：Unit 7；10分）参考答案

unit7_单元自测7（预备知识：Unit 7；10分）0

unit7_单元自测7（预备知识：Unit 7；10分）0

试卷总分:100 得分:100国开形成性考核答案

1. — ?Some cars are really expensive.

— ? ? ? ? ? ? ? ? ? ? ? ?渝粤搜题

A. Certainly they are. They burn less gas.?

B. I don't know about that.?

C. I do hope so.?

答案:

国开形成性考核答案

2.— ?That’s a nice car!

— ? ? ? ? ? ? ? ? ? ? ??

A. You can have it.

B. Oh,thanks.I go it yesterday.

C. Sorry,it's too cheap.

答案:国开搜题

3.All the mobile phones must __________?before the meeting begins.?

A. be turning off

B. be turned off

C. turn off

答案:

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。

4.Tom?_______ have?kept?his?promise.?I?wonder?why?he?changed?his?idea.?

A. must国家开放大学作业答案

B. should

C. need

答案:

5.This medicine __________ before dinner.?

A. should have been took

B. should be taken

C. should have taken

答案:

6.二、完型填空：阅读下面短文，从A、B、C三个选项中选择合适的内容将短文补充完整。

? ? ?You jump into a car, tell it where you want to go then sit back and let a computer take control. It seems a dream in the future. It isn't.渝粤教育

? ? ?In many ways such driverless cars are already with us. There is partial automation in many cars, such as intelligent braking, lane departure warning and automatic parking. The systems are there ?cars can pretty much drive themselves. No one noticed the introduction of cruise control. We've got collision avoidance, and we'll soon have automatic lane change.一网一平台答案

? ? ?Improving this technology should make the roads safer. Machines are much better at following rules than humans. Driveway signs advise drivers to slow down to avoid ?jams. They are often ignored by drivers. But it won't happen ?a computer. Driverless cars could also choose the best route to avoid traffic jams.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。

? ? ?Fewer jams will mean ?stop-start driving. Maintaining smooth and constant speeds will improve fuel efficiency. Computers could also be programmed to take the greenest route, rather than the fastest one. Under?computer control, cars could also travel much closer together.

? ? ? They can effectively “slipstream” one another and use less fuel to move themselves forward. They can even form multi-car “trains” going ?high speeds. However, with driverless cars on the roads, there will be potential trust issues between people and machines. We could therefore see guard rails back on the sides of pavements. This would be a backwards step.

1. ? ?A. because ? ? ? B. so that ? ? ? ?C. such as

2. ? ?A. creating ? ? ? ?B. to creat ? ? ? C. creat

3. ? ?A. with ? ? ? ? ? ? ?B. to ? ? ? ? ? ? ? C. on

一网一平台答案国开形成性考核答案

4. ? ?A. more ? ? ? ? ? ? B. little ? ? ? ? ? ?C. less

国开搜题

5. ? ?A. over ? ? ? ? ? ? ?B. in ? ? ? ? ? ? ? C. at

(1).

A. A渝粤搜题

B. B

C. C

答案:

(2).

A. A渝粤搜题

B. B国开搜题

C. C

答案:

(3).

A. A

B. B国开搜题

C. C

答案:国开搜题

(4).

A. A

B. B

C. C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。

答案:

(5).

A. A

B. B

C. C一网一平台答案

答案:渝粤教育