單項選擇題

Carbon dioxide as a fire fighting agent has which advantage over other agents?（）.

A.It causes minimal damage
B.It is safe for personnel
C.It is cheaper
D.It is most effective on a per unit basis

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單項選擇題

Certain cargoes must be segregated because of their（）.

A.inherent characteristics
B.weight
C.destination
D.danger to humans

單項選擇題

Chafing gear（）.

A.reduces and prevents corrosion of standing rigging
B.prevents corrosion of running rigging
C.reduces and prevents wear caused by the rubbing of one object against another
D.protects the body against extreme cold

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