空压机怎样停车?

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问题:

空压机怎样停车?

考点:压缩机工考试高级压缩机工高级压缩机工题库
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阅读理解。

     Do teenagers in small villages do chores at home? How about the teenagers in big cities?

     Here is a survey. We asked 4,000 teenagers in China several questions. Half of them come from big

cities like Beijing, Shanghai and Guangzhou.The others are from small villages. We made a diagram of the

result of our survey. Let's have a look at it.

     We found out that teenagers from small villages do more chores than those from big cities.  Maybe it

is because they live a harder life.Our advice to parents in big cities is that parents should give their children some chores to do. Doing chores teaches teenagers to take care of themselves.

1. They surveyed ______ teenagers from small villages.

A. 1,000      

B. 2,000      

C. 4,000      

D. 3,000

2.There are l,000 teenagers from the cities who______.

A. take out the trash    

B.do the dishes

C. make the bed    

D.fold the clothes

3. Fewer than______teenagers in big cities sweep the floor and make the bed.

A. 500    

B.1,000    

C.1,500    

D.2,000

4. The number of teenagers______in big cities is bigger than that in small villages.

A. making the bed    

B.taking out the trash

C. folding the clothes    

D.doing the dishes

5. Why did they make the survey?

A. Because they don't want teenagers in China to do chores at home.

B. Because they thought it'Il help teenagers to take good care of themselves to do chores at home.

C. Because they wanted to know if teenagers in China do chores at home.

D. Because they thought it's not necessary for teenagers to look after themselves.

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下列图示中,最能显示“ * * ”期间我国工农业总产值变化趋势的一幅是[ ]

A、

B、

C、

D、

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浅孔爆破时,炮孔直径小于50mm,炮孔深度小于6mm。

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假设有文件列表框File1、驱动器列表框Drivel和目录列表框Dirl,为了使三者同步,在下列语句中,正确的语句是 ______。
Ⅰ.File1. Path=Did.Path Ⅱ.File1. FileName=Dirl.FileName
Ⅲ.Dirl.Path=Drivel.Drive Ⅳ.Dirl. Path=Drivel. Path

A.Ⅰ和Ⅲ

B.Ⅰ和Ⅳ

C.Ⅰ、Ⅲ和Ⅳ

D.以上全部

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听觉()的高低直接影响儿童的音乐才能和言语能力的发展。

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