单项选择题
An inflation life raft should be lifed back aboard the ship by using（）.
A.the single hook at the top of the raft B.two lines passed under the raft C.the towing bridle D.All of the above
单项选择题 An inflatable liferaft should be manually released from its cradle by（）.
单项选择题 An on-load release system on a survival craft means the cable can be released（）.
单项选择题 An oxygen indicator can be used to determine if there is（）.
