为了防止在离心式压缩机停机时,可能发生倒灌事故,操作错误的是() A.打开放空阀,使

题型:单项选择题

问题:

为了防止在离心式压缩机停机时,可能发生倒灌事故,操作错误的是()

A.打开放空阀,使气体放空

B.打开回流阀,使气体回流

C.切实关好系统管路的逆止阀

D.不需要降速,直接停机

考点:压缩机工考试初级压缩机工初级压缩机工题库
题型:单项选择题

“当中国人实行一种激烈的禁烟运动而使危机加剧的时候,战争果然就来到了。”这里所说的“战争”是指       [      ]

A.鸦片战争            

B.第二次鸦片战 争

C.甲午中日战争        

D.八国联军侵华战争

题型:单项选择题

阅读理解。

     I made a pledge (发誓) to myself on the way down to the vacation beach cottage. For two weeks I would

try to be a loving husband and father. Totally loving. No ifs, ands or buts.

     The idea had come to me as I listened to a talk on my car radio. The speaker was quoting a Biblical (圣经

的) passage about husbands being thoughtful of their wives. Then he went on to say, "Love is an act of will.

A person can choose to love." To myself, I had to admit that I had been a selfish husband. Well, for two weeks

that would change.

     And it did. Right from the moment I kissed Evelyn at the door and said, "That new yellow sweater looks

great on you.

     "Oh, Tom, you noticed," she said, surprised and pleased, maybe a little puzzled.

     After the long drive, I wanted to sit and read. Evelyn suggested a walk on the beach. I started to refuse, but

then I thought, "Evelyn's been alone here with the kids all the week and now she wants to stay with me." We

walked on the beach while the children flew their kites.

     So it went. Two weeks of not calling the Wall Street firm where I am a director; a visit to the shell museum

though I usually hate museums. Relaxed and happy, that's how the whole vacation passed. I made a new pledge to keep on remembering to choose love.

     There was one thing that went wrong with my experiment, however. Evelyn and I still laugh about it today.

Last night at our cottage,p reparing for bed, Evelyn stared at me with the saddest expression.

     " What's the matter?" I asked her.

     "Tom," she said in a voice filled with distress, "do you know something I don't?"

     "What do you mean?"

     " Well...that checkup (体检) I had several weeks ago...our doctor...did he tell you something about me?

Tom, you've been so good to me...am I dying?"

     It took a moment for it all to sink in. Then I burst out laughing.

     "No, honey," I said, wrapping her in my arms. "You're not dying; I'm just starting to live."

1. In the first paragraph, "No ifs, ands or buts" probably means ____. [ ]

A. unnecessarily

B. unexpectedly

C. impossibly

D. unconditionally

2. From the story we may infer that Tom drove to the beach cottage _____.[ ]

A. with his family

B. with Evelyn

C. alone

D. with his children

3. During the two weeks on the beach, Tom showed more love to his wife because _____. [ ]

A. she looked lovely in her new clothes

B. he had made a lot of money in Wall Street

C. he was determined to be a good husband

D. she was seriously ill

4. The underlined words "one thing" in the text refer to the fact that _____. [ ]

A. he praised her sweater, which puzzled her

B. she insisted on visiting a museum, which he hated

C. he knew something about her illness but didn't tell her

D. he was so good to her that she thought she must be dying

5. By saying "I'm just starting to live", Tom means that _____. [ ]

A. he is just beginning to understand the real meaning of life

B. he is just beginning to enjoy his life as a loving husband

C. he lived an unhappy life before and is now starting to change

D. he is beginning to feel regretful for what he did to his wife

题型:单项选择题

一个节目只有拥有节目______,才能被纳入广播电台、电视台节目制作和播出的轨道。

题型:单项选择题

焊条电弧焊常用的装配夹具有()。

A.夹紧工具

B.压紧工具

C.拉紧工具

D.回转工具

题型:单项选择题

AIDP可有脑神经麻痹,最常受累的是第()、()、()对脑神经,其次为第()、()、()对脑神经。

更多题库