单项选择题
The limit switches on a ships survival-craft winch system（）.
A.stop the winch just before the craft reaches the final stowage position B.limit the amount of cable on the drum C.limit the ascent rate D.stop the winch in case the craft weighs too much
单项选择题 The lights on the outside of the canopy on an inflatable liferaft operate（）.
单项选择题 The inside light in an inflatable liferaft is turned on（）.
单项选择题 The hydrostatic release on the inflatable liferafts on a fishing vessel must be（）.
