A.power
B.speed
C.resistance
D.thrust force
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A.take；save
B.to take；save
C.take；to save
D.to take；to save
A.is used to be
B.was used to be
C.used to be
D.was used to
A.has left
B.had left
C.has been away
D.had been away
A.in
B.to
C.from
D.by
A.stand by
B.stand for
C.stood by
D.stood for
最新試題
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For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
The treatment of the fuel oils involves storage, heating, filtering and（）