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【多选题】
关于压水管路的设计要求,以下叙述正确的有:( )。A.
在必要的地方设柔性接口或伸缩接头
B.
在转弯、三通等受内部推力处设支墩或拉杆
C.
闸阀直径D≥500mm时,应用电动或水力闸阀
D.
不允许水倒流时,要设置止回阀。
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【简答题】We have been told that under no circumstance_____ the telephone in the office for personal affairs. A．may we use B．we may ring C．we could borrow D．did we answer
【多选题】中国新民主主义革命在全国胜利并解决了土地问题之后，中国社会经济存在的经济成分包括
A.
国营经济
B.
合作社经济
C.
个体经济
D.
私人资本主义经济
E.
国家资本主义经济
【单选题】We have been told that under no circumstance ______ the telephone in the office for personal affairs.
A.
may we use
B.
we may use
C.
we would use
D.
did we use
【单选题】We have been told that under no circumstance _____ the telephone in the office for personal use.
A.
may we use
B.
we may use
C.
we could use
D.
did we use
【单选题】In no circumstance can more work be got out of a machine than __ .(1994年1月六级题)
A.
is put into it
B.
to put it into it
C.
to be put into it
D.
that puts into it
【单选题】In no circumstance __________ .
A.
smoking should be allowed on the campus
B.
should smoking be allowed on the campus
C.
should smoking allowed on the campus
D.
should smoking allow on the campus
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