【判断题】【消耗次数：1】
通过固定平行平板缝隙的流量与 压力 一次方成正比，与 间隙 的三次方成正比，这说明液压元件内的 配合间隙 的大小对其泄漏量的影响非常大。滑阀的中位机是能三位滑阀在中位时各油口的连通方式，它体现了换向阀的控制机能。
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正确
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【判断题】
液流流经薄壁小孔的流量与 小孔通流面积 的一次方成正比，与 压力差 的1/2次方成正比。通过小孔的流量对 温度 不敏感，因此薄壁小孔常用作可调节流阀。
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正确
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错误
随机题目
【单选题】
11. I thought you _____ like something to read, so I have bought you some books.
①
may
②
might
③
could
④
must
【单选题】
3. Few of them hurt themselves in the accident last night, ____ ?
①
but
②
and
③
though
④
so
【单选题】
9.The old farmer, ____the badly injured and burnt soldier, came out of the burning farmhouse, calling continuously for help.
①
supporting
②
having supported
③
being supported by
④
being supported
【单选题】
5.____the front door____, he had to enter the room through the back door.
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Seen, painted
②
Seeing, painted
③
Being seen, being painted
④
Seeing, being painted
【单选题】
16. As I will be away for at least a year, I’d appreciate____ from you now and then so that I can know how everyone is getting along.
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having heard
②
to hear
③
hearing
④
beingheard
【单选题】
7.He looked around and caught a man____his hand into the pocket of a passenger.
①
put
②
to be put
③
to put
④
putting
【单选题】
14.The thief fell to the ground，his left foot ____and blood ____down from his mouth.
①
breaking; running
②
broken; running
③
breaking; run
④
broken; run
【单选题】
18.- Did you get a dictionary?- No, I _____, but there were not any _____.
①
tried; to be left
②
had tried to; leaving
③
tried to; left
④
had tried; have left
【单选题】
4.____the diamond, he had to look for a place to hide it.
①
Having stolen
②
Having been stolen
③
Stolen
④
Stealing
【单选题】
12.You can’t imagine what great trouble they have ____the problem____.
①
to solve; being talked about
②
solving; discussing
③
to solve; to talk about
④
solving; being discussed