单项选择题

The air spaces in the floor of an inflatable liferaft will provide protection against（）.

A.asphyxiation from CO2
B.loss of air in the sides of the raft
C.rough seas
D.cold water temperatures

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单项选择题
Signaling devices which are required on inflatable liferafts include（）.

A.a rocket shoulder rifle
B.an oil lantern
C.red flares
D.an air horn
单项选择题
Signaling devices required on inflatable liferafts include a(n) （）.

A.Very pistol
B.orange smoke signal
C.air horn
D.lantern
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