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單項(xiàng)選擇題

A fuel line breaks, sprays fuel on the hot exhaust manifold, and catches fire. Your first action should be to（）.

A.Batten down the engine room
B.start the fire pump
C.apply carbon dioxide to the fire
D.shut off the fuel supply

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單項(xiàng)選擇題

A fuel-air mixture below the lower explosive limit is too（）.

A.rich to burn
B.lean to burn
C.cool to burn
D.dense to burn

單項(xiàng)選擇題

A gas-free certificate would usually be issued by a (n)（）.

A.CCS marine surveyor
B.certified marine chemist
C.port engineer
D.HAS marine inspector

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