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單項(xiàng)選擇題

The collision bulkhead shall be of（）.

A.water-tight
B.air-tight
C.fire-tight
D.oil-tight

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單項(xiàng)選擇題

The damage arose（）the accident.

A.against
B.of
C.for
D.from

單項(xiàng)選擇題

The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means（）.

A.displacement
B.fumigation
C.discharging
D.compensation

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