单项选择题
An inflatable liferaft should be manually released from its cradle by（）.
A.cutting the straps that enclose the container B.removing the rubber sealing strip from the container C.loosening the turnbuckle on the securing strap D.pushing the button on the hydrostatic release
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（）.
单项选择题 Anchoring and fishing in this area are（）.
