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單項(xiàng)選擇題

The withdrawing of the cylinder liners, in general, depends on their （）.This may amount to approximately 1/120 of the diameter in some engines.

A.correct maneuvering
B.wear
C.working efficiency
D.maintenance

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單項(xiàng)選擇題

The way to reduce （） is to build up a film of lubricant between any two surfaces that rub against each other.

A.friction
B.collision
C.inertia
D.resistance

單項(xiàng)選擇題

The viscosity regulator controls the fuel oil temperature （） provide oil at the correct viscosity for combustion.

A.in order that
B.because of
C.in order to
D.owing to

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