简述BCU报重大故障的3种情况?

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问题:

简述BCU报重大故障的3种情况?

考点:动车组机械师考试CRH5型动车组机械师CRH5型动车组机械师题库
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已知2x2-3=5,你能求出x2+3的值吗?说明理由.

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氨压缩浅冷装置中,再生后()不会引起乙二醇损失。

A.乙二醇被烃带走

B.再生过程损失

C.系统漏失

D.乙二醇浓度大于85%

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阅读理解。

     Researchers found that walking around with a forced smile and fake (假的) happiness simply leads to

people feeling unhappier. So, putting a brave face on your sadness could be harmful. The research also

found that women suffered more than men when pretending to be happy.

     Dr. Brent Scott, who led the study, said employers should take note because forcing workers to smile when dealing with the public can result in bad outcomes. He said, "Smiling for the sake of smiling can lead

to emotional tiredness, and that's bad for the organization." He also said the research showed

customer-service workers who had "fake smiles" throughout the day fell into a bad mood and didn't want

to work, so their productivity dropped.

     The study is one of the first of its kind to examine emotional expressions over a period of time and

compare the different effects on men and women. Dr. Scott's team examined the effects of "surface

acting", or fake smiling, compared to "deep acting", or making people smile by thinking of peasant

memories.

     Dr. Scott said, "Women were harmed more by surface acting, meaning their moods worsened even

more than men's. However, they were helped more by deep acting, which means their moods improved

more by thinking of pleasant memories. "

     According to Dr. Scott, women tend to suffer more when pretending to be happy because they are

expected to be more emotionally expressive than men. Therefore, forcing a smile while feeling down is

more likely to go against their normal behavior and cause more harmful feelings.

     Although deep acting can improve moods a little in the short term, Dr. Scott says, it's not a long-term

solution to feeling unhappy. "There have been some suggestions that if you do this over a long period you

start to feel unreal. You're trying to develop positive emotions, but at the end of the day you may not feel

like yourself any more."

1. According to the passage, Dr. Scott's study ______.

A. is supported by some big employers in the USA

B. is meaningful as there haven't been many similar ones

C. examined more women than men for a long time

D. aimed to make the employees more productive

2. Women suffer more from fake happiness mainly because ______.

A. they usually turn up shy in public places

B. they should be more emotionally expressive

C. they are often treated in a terrible way

D. they like thinking of pleasant memories

3. It is implied in the passage that deep acting _____.

A. doesn't have any effect on men

B. cannot improve our moods in any case

C. harms our feelings in the long run

D. pleases people by feeling like another person

4. What is the best title for the passage?

A. Fake smiling makes people unhappy.

B. Women shouldn't be forced to smile.

C. An important suggestion for workers.

D. Why people don't want to work.

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分别用动滑轮、定滑轮和滑轮组匀速提起同一物体,如果每个滑轮的重相同,不计绳和摩擦,则机械效率最高的是(  )

A.动滑轮

B.定滑轮

C.滑轮组

D.无法确定

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简析《北极风情画》和《塔里的女人》的构思特色。

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