单项选择题

Since the fire is increasing on board the vessel，the Captain orders that the ship be（）.

A.subtle
B.dental
C.brittle
D.scuttled

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单项选择题

Shipping society approved buoyant work vests are considered to be items of safety equipment and may be worn by members of the crew（）.

A.in lieu of life preservers during fire drills
B.in lieu of life preservers during boat drills
C.in lieu of life preservers during an actual emergency
D.when carrying out duties near a weather deck's edge

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Removing which will extinguish a fire?（）.

A.Nitrogen
B.Carbon dioxide
C.Sodium
D.Oxygen

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Regular foam can be used on all but which flammable liquid?（）

A.Motor gasoline
B.Jet fuel
C.Crude petroleum
D.Alcohol