A.by which
B.to which
C.in which
D.at which
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A.inside；associated
B.inside；not associated
C.outside；associated
D.outside；not associated
A.fuel-air ratio
B.compression ratio
C.fuel rack
D.viscosity index
A.boiler
B.main engine
C.auxiliary engine
D.incinerator
A.flash；fresh air
B.wash；fresh water
C.flush；compressed air
D.rush；diesel oil
A.has learnt
B.have learnt
C.learn
D.are learning
最新試題
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When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish