A.hold；responsibility
B.ask；responsibility
C.hold；responsible
D.require；responsible
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A.do
B.to do
C.done
D.doing
A.update
B.finish
C.outdated
D.expire
A.Any surge occurs
B.Any surge occurred
C.Should any surge occur
D.Should any surge occurring
A.Were there loss of energy by friction
B.Since there be loss of energy by friction
C.Were there no loss of energy by friction
D.Should be no loss of energy by friction
A.The smoother；the greater
B.Smoother；less
C.The rougher；the greater
D.rougher；greater
最新試題
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If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）