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问题 问答题 简答题

高压缸排汽逆止门何时开启，何时关闭？

答案

参考答案：

高压缸排汽逆止门在高压缸正常进汽时开启；

在机组启动或停运的低负荷过程中，当中压缸进汽时关闭，另外，在机组跳闸时关闭。

单项选择题

One day a rich woman lost her purse with a lot of money in it. So she made a (1) , "If anybody finds my purse and (2) it to me, I’ll give half the money to him."A poor man (3) the purse near a shop. He sent it back to the woman, but the rich woman (4) . "There was an expensive ring in my purse besides money," said the woman, "I won’t give you half the money in my purse until you return it to me." "But I’ve never seen an expensive ring in (5) purse," said the man.They began to quarrel. The man became (6) and took her to a judge. (7) the judge heard what had happened to them, he said to the woman, "I’m sure that you have lost a purse, and there is an expensive ring in it. But there is (8) a lot of money in this purse. So I don’t think it’s yours. (9) some time. Maybe somebody will give your purse back."Then the judge (10) to the man and said, "Take the purse home. If the owner doesn’t come to get it back in two days, it will be yours.

 

第（9）空应选择（）

A．Wait for

B．Listen to

C．Look after

D．Talk about
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单项选择题

新生儿唾液腺发育不成熟，在什么时期唾液分泌逐渐增多，能产生较多淀粉酶（）

A．3～4个月

B．1个月

C．5～6个月

D．2个月

E．出生时
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