单选题Aboard a survival craft,ether can be used to（）.Astart the engine in cold weatherBaid in helping personnel breatheCprime the sprinkler systemDprime the air supply
单选题
Aboard a survival craft,ether can be used to（）.
A
start the engine in cold weather
B
aid in helping personnel breathe
C
prime the sprinkler system
D
prime the air supply
参考解析
解析：
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