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【单选题】
单级压气机功与压气机转速之间的关系为A.
与转速的三次方成正比
B.
与转速成正比
C.
与转速的平方成反比
D.
与转速的平方成正比
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举一反三
【单选题】When ________ that it was getting late, I turned off the light and went to bed.
A.
find
B.
founnd
C.
being found
D.
finding
【简答题】Once in bed,I read for twenty minutes and then _______ the light. A．turned out B．turned over C．turned on D．turned up
【单选题】Once in bed, I read for twenty minutes and then ______ the light. [ ]
A.
turned out
B.
turned over
C.
turned on
D.
turned up
【单选题】The old gentle man ______ to be an old friend of his grandfather's.
A.
turned in
B.
turned over
C.
turned up
D.
turned out
【单选题】I’d almost given up hope of finding a car I liked, and then suddenly this one_________ .
A.
turned over
B.
turned down
C.
turned on
D.
turned up
【多选题】关于滑坡类型，说法正确的有()
A.
按运动速度可分为崩塌性滑坡、蠕动性滑坡、高速滑坡
B.
按运动形式可分为牵引式滑坡和推(移)动式滑坡
C.
按形成的时间可分为新生滑坡和古滑坡两类
D.
按主滑面成因类型分为堆积面滑坡、层面滑坡、构造面滑坡
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