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單項選擇題

（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.

A.The driven gear
B.The drive
C.The grease
D.The lubricating oil

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單項選擇題

（） water is more expensive than fresh water It has high specific heat and low viscosity.

A.Distilled
B.Distilling
C.Boiling
D.Boiled

單項選擇題

（） 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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