单项选择题
The purpose for the bag or box on top of some survival craft is to（）.
A.right the craft in case of capsizing B.increase area for radar detection C.act as a sail in case of a power loss D.steady the craft in heavy seas
单项选择题 The locking pin that joins the parts of a detachable link is held in position by（）.
单项选择题 The lifeline of a life float or buoyant apparatusshall（）.
单项选择题 The lay of a line refers to（）.
