盲轴的作用是什么?

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问题:

盲轴的作用是什么?

考点:煤炭矿山职业技能鉴定考试煤矿机械安装工(初级)煤矿机械安装工(初级)题库
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Dearest Mom and Dad,

I'm afraid I have some very bad news for you. I have been very naughty and the school principal is very angry with me. She is going to write to you. You must come and take me away from here. She does not want me in the school any longer.

The trouble started last night when I was smoking a cigarette in bed. This is against the rules, of course. We are not supposed to smoke at all.

As I was smoking, I heard footsteps coming towards the room. I did not want a teacher to catch me smoking, so I threw the cigarette away.

Unfortunately, the cigarette fell into the waste-paper basket, which caught fire. There was a curtain near the waste-paper basket which caught fire, too. Soon the whole room was burning.

The principal phoned for the fire department. The school is a long way from the town and by the time the fire department arrived, the whole school was in flames. Many of the girls are in the hospital.

The principal says the fire was my fault and you must pay for the damage. She will send you a bill for about a million dollars.

I am very sorry about this.

Much love, Sarah

P.S.

None of the above is true, but I have failed my exams. I just want you to know how bad things could have been!

小题1:Sarah wrote to her parent______

A. to inform them about an accident

B. to ask them for money

C. to them wonderful news

D. to tell then she had failed her exams小题2:Sarah told her parents the story about the fire because______

A.she wanted to make them worried

B.she wanted them to have some fun

C.she wanted to make them less angry at the real news

D.she wanted to make them even more angry小题3:The main body of the letter was_____

A.mostly true

B.partly true

C.all true

D.completely untrue小题4:Sarah said the principal was angry because____

A.she had failed her exams

B.it was her fault that the fire had broken out

C.she not make the phone call in time

D.she had caught her smoking in bed

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样式和模板各有其用处和优点?()

A.模板适用于存储保持不变的信息

B.样式库则不适用于控制格式

C.如果将某个样式存储在模板中,则该样式不影响以后使用此模板创建的文档

D.使用样式库时,刷新样式库也不可以在所有文档中启用新的样式定义

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属于讯息的是()

A.艾滋病感染

B.传染性疾病

C.地震灾害

D.有害健康

E.吸烟有害健康

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营养干预场所为()

A.居民社区

B.学校

C.工作场所和医院

D.以上都是

题型:问答题 简答题

()系统由导轨、导靴和导轨架组成。

A、导向

B、曳引

C、重量平衡

D、轿厢

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