滚筒上钢丝绳排列不整齐的危害主要有:()。A、排绳装置失效 B、加快钢丝绳磨损 C、易造

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问题:

滚筒上钢丝绳排列不整齐的危害主要有:()。

A、排绳装置失效

B、加快钢丝绳磨损

C、易造成钢丝绳滑出滚筒外

D、易造成车辆落道

考点:煤矿运输工煤矿运输工题库
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违反国家法律、法规的行为,危及计算机信息系统安全的事件,称为计算机案件。

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下列叙述正确的是(  )

A.只有悬空的物体才受重力

B.只有下落的物体受到重力方向是竖直向下

C.上升的物体受到重力方向是竖直向下的

D.只有地球表面的物体才受到重力

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发展循环经济的工作基础?

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More American people take their troubles with them on holiday, according to a new survey. Although 40 percent said that the main reason for going away is to escape pressure from work, almost all said they worry more than they do at home. Only four in every 100 said that they are happy and free of care.

The most common worry is burglary(入室盗窃), with four out of 10 worrying about their homes being broken into while they’re abroad. More than a quarter fear they will feel crazy with some other noisy and rough holiday-makers and 22 percent worry they may be attacked or their possessions will be missing. One in five think the car may break down, and the same number worry about the chances of bad weather.

The survey also showed that the stay-at-home Americans are no more. Three out of every five want to have a holiday abroad, a great increase from the figures only three years ago. The hotel holiday is still a winner, with about one third of all Americans preferring to go on a self-catering(自助) holiday.

小题1:The underlined word “survey” in the first paragraph most probably means _______.

A.research

B.review

C.exhibition

D.examination小题2:according to the text, about _____ of people worry more on holiday than when they are at home.

A.25%

B.40%

C.80%

D.95%小题3:The third most common worry of American holiday-makers is that they may______.

A.be attacked or lose their possessions

B.have problems with their cars on the road

C.have bad weather on holiday

D.get mixed with some rough fellow holiday-makers小题4:Where do American holiday-makers like to stay most?

A.At a hotel.

B.In a quiet place.

C.At a friend’s house.

D.Where they can cook for themselves.

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间硝法浓硝装置中的漂白塔是()。

A.填料塔

B.筛板塔

C.浮阀塔

D.泡罩塔

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