單項(xiàng)選擇題

In addition to lubricating, cylinder oil assists in forming a gas seal and contains （） which clean the cylinder liner.

A.additives
B.water
C.grease
D.acid solution

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單項(xiàng)選擇題

In a typical fuel system, the oil is stored in （） in the double bottom.

A.setting tanks
B.service tanks
C.tanks
D.drain tanks

單項(xiàng)選擇題

In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

A.a service tank
B.a collecting tank
C.a sump
D.a settling tank

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