为什么凝汽器真空到零后,才可以停止向轴封供汽?

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问题:

为什么凝汽器真空到零后,才可以停止向轴封供汽?

考点:汽轮机检修汽轮机运行与检修汽轮机运行与检修题库
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Although I had left school against the advice of my teachers, I had, without telling anyone, tried to  36  my studies in literature at evening classes. It was a tiresome  37  from one end of the city to another and to  38  among adults was uninteresting. I was the youngest in the  39 , so the friendship I knew at school was  40 . I put up with it for a short period. It was  41  long a walk on cold winter’s nights and it was hard to put my  42  into Shakespeare with wet shoes and trousers. So I continued writing poetry at home.
By chance, I  43  some prizes and awards for literature. A young woman from a  44  company came to the college one day. She told me that I won a national poetry award. I  45  at her in astonishment and disbelief. She wanted to make a short  46  about me, to which I said, “ No, I couldn’t do that.” Not that I had any real  47 . I was just frightened. In the end she  48    me that I should do it the following day.
So I did. They made a short film of me reading one of my  49  and I became  50  interested in literature than ever. I  51  what I should do after this, and decided some weeks later that I could not  52  myself spending the rest of my days dealing with machines. So one evening, I hesitatingly told my parents that I wanted to _53  to school. They were greatly surprised and a little afraid, but they did not try to persuade me not to. They wanted to know if I was  54 , and if I knew what it meant and  55  I realized that if I gave up my job training, it would be very difficult to get a good job. But nothing could stop me, and they asked about the matter no further.
36.A.stop                 B.go on                  C.continue        D.walk
37.A.talk                    B.journey               C.job              D.walk
38.A.do              B.sit             C.talk           D.work
39.A.family         B.class           C.city            D.country

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40.A.absent           B.missed          C.lost            D.over

41.A.too             B.very           C.much          D.quite
42.A.mind          B.heart           C.soul            D.thought
43.A.defeated        B.beat            C.won               D.hit
44.A.TV            B.radio            C.shoe            D.food
45.A.looked           B.fixed           C.shouted         D.stared
46.A.talk           B.film             C.conversation     D.speech
47.A.reason         B.cause           C.excuse          D.wish
48.A.advised        B.suggested        C.agreed         D.persuaded
49.A.poems         B.stories          C.speeches        D.plans
50.A.less           B.much          C.far             D.more
51.A.wandered         B.considered      C.discussed        D.wondered
52.A.think          B.consider         C.spend           D.imagine
53.A.drop           B.leave           C.return          D.go to
54.A.sure           B.clear           C.curious         D.true
55.A.whether                       B.that                            C.how            D.what
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根据我国《保险法》的规定,保险人收到被保险人或者受益人的赔偿或者给付保险金的请求后,对不属于保险责任的,保险人应当采取通融赔付的方式,向被保险人或者受益人支付部分保险金。

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术前对病人肝功能的评估中,以下哪项错误()。

A.常规的出、凝血时间检查不能说明凝血机制的全部

B.有肝实质性病变、黄疸者,术中、术后易于发生DIC

C.有肝实质性病变、黄疸者,术中、术后可出现原发性纤溶

D.血浆白蛋白水平下降可使药效降低

E.黄疸病人术后较易出现急性肾衰竭

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青枝骨折错误的说法是()

A.可以不见骨折线

B.是不完全性骨折

C.好发于儿童

D.局部骨皮质凹陷、隆起

E.可以有对位不良

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