单项选择题

An inflatable liferaft is hand-launched by（）.

A.pulling a cord
B.cutting the wire restraining bands
C.removing the rubber packing strip
D.throwing the entire container overboard

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单项选择题
After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.

A.hoist man
B.limit switch
C.brake handle
D.preventer bar
单项选择题
After launching，an inflatable raft should be kept dry inside by（）.

A.Opening the automatic drain plugs
B.Draining the water pockets
C.Using the electric bilge pump
D.Using the bailers and cellulose sponge
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