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單項(xiàng)選擇題

The term "discharge", as it applies to the pollution regulations, means（）.

A.spilling
B.leaking
C.dumping
D.All of the above

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單項(xiàng)選擇題

To prevent the spread of fire by convection you should （）.

A.remove combustibiles from direct exposure
B.cool the bulkhead around the fire
C.close all openings to the area
D.shut off electrical power

單項(xiàng)選擇題

When welding or burning aboard a vessel, you must be certain that the space （）.

A.is properly vented
B.contains no explosive fumes
C.has no oil in the bilges
D.all of the above

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