單項(xiàng)選擇題

（） 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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單項(xiàng)選擇題

（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.

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

單項(xiàng)選擇題

（） or air venting arrangement is fitted to the fuel supply passage.

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