轴系找中的目的,是要保证两个转子在正常运行状态时的()要求A、同轴度B、平行度C、位

题型:单项选择题

问题:

轴系找中的目的,是要保证两个转子在正常运行状态时的()要求

A、同轴度

B、平行度

C、位臵度

D、对称度

考点:矿井维修钳工(初级)矿井维修钳工(初级)题库
题型:单项选择题

在有条件使用再生水的地区,限制或者禁止将自来水作为()。

A.城市道路清扫使用

B.城市绿化使用

C.景观用水使用

D.厕所冲洗使用

E.家具冲洗使用

题型:单项选择题

以下不能正确计算代数式1/3sin2(1/2)值的C语言表达式是【 】。

A.1/3*sin(1/2)*sin(1/2)

B.sin(0.5)*sin(0.5)/3

C.pow(sin(0.5),2)/3

D.1/3.0*pow(sin(1.0.2),2)

题型:单项选择题

阅读理解。

        For the last couple of weeks, I had been stuck in front of my computer working on a project that was

very important to me. My every waking hour was consumed by the project and although I imagined that I

would feel happy after completing parts of the project, I was confused to find that instead, I was feeling

rather depressed. I tried a range of methods to help cheer myself up. I had a relaxing bath, cooked a

delicious meal to enjoy with my family and even watched a lighthearted movie, but to no avail. It was only

when I turned to meditation(沉思)for a solution that the answer came to me: turn to nature!  

        The very next day, I grabbed my camera and a bottle of water and set off to spend a few hours

walking in a nature reserve, even though it was pouring with rain. Within a couple of minutes I felt alive

again. To be honest, I felt like a young school girl again and had to stop myself from hopping along the

path singing, "I'm singing in the rain", a song I used to sing when I was a child. I think as adults we often try

too hard to control our inner children and as a result we restrain(限制) our own spirits, which only leads to

depression and stress.    

        Interestingly, it has been shown that people who spend 40 minutes walking in a nature reserve have a

drop in their blood pressure levels, but this does not happen when they spend a similar amount of time

walking in a busy city centre.    

        If you feel a little low in spirit and know that you have spent too much time indoors, relax completely,

remove your shoes and let your inner child come out and play.

1. The author felt depressed because she __________.

A. couldn't consume her waking hour    

B. had not seen a film for a long time.

C. had not finished her work on time  

D. had worked on a hard job for too long

2. The author walked in a nature reserve in the rain in order to__________.

A. take photos                      

B. find a solution to the project

C. hop along the path              

D. cheer herself up

3. The underlined part "to no avail" in Paragraph 1 probably means " __________.".

A. unsuccessful        

B. unrelated

C. uninteresting    

D. unexpected

4. In the author's opinion, __________.

A. a bath can make people relaxed

B. depression is usually caused by hard work

C. walking in a busy city centre harms people's health

D. adults should express their inner feelings freely

5. The last paragraph mainly serves as a(n) __________.

A. explanation        

B. suggestion

C. introduction    

D. reminder

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