单项选择题

（） the engines, the diesel engine is（） used engine on board.

A.Between；more commonly
B.Among；the most commonly
C.Between；not more commonly
D.Among；not the most commonly

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单项选择题

A.Except for
B.Beside
C.Except
D.In addition to

单项选择题

A.An air pump
B.A compressor
C.A fuel pump
D.A priming

单项选择题

A.The detergency；the alkalinity
B.The alkalinity；the detergency
C.The inhabitant；the water
D.The additives；the distilled water