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單項(xiàng)選擇題

The danger associated with using carbon dioxide in an enclosed space is（）.

A.frostbite
B.skin burns
C.asphyxiation
D.an explosive reaction

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單項(xiàng)選擇題

The bottom row of plating next to the keel of a lifeboat is known as the（）.

A.sheer strake
B.bilge strake
C.garboard strake
D.keel rib

單項(xiàng)選擇題

The backup system on an electric start survival craft is a（）.

A.hydraulic system
B.pneumatic system
C.spare battery
D.hand crank

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