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單項(xiàng)選擇題

The words such as quantity, grade, viscosity and specific gravity should be in the （）.

A.repair list
B.spare parts order list
C.price list
D.bunker list

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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

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