單項選擇題

（）on board ship are used to control and distribute the electrical energy generated by generators.

A.Governors
B.Alternators
C.Blackboards
D.Switchboards

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單項選擇題

The heavy-duty lubricating oil with chemical has been widely introduced in recent years（）

A.additives
B.behavior
C.coolant
D.desiccant

單項選擇題

Great care is dedicated to the removal of from the scavenge air（）

A.gravity
B.viscosity
C.density
D.humidity