单项选择题
The inside light in an inflatable liferaft is turned on（）.
A.automatically as the liferaft inflates B.with a switch near the boarding handle C.at night because the light has a photosensitive switch D.by screwing the bulb in after the raft is inflated
单项选择题 The hydrostatic release on the inflatable liferafts on a fishing vessel must be（）.
单项选择题 The capacity of any liferaft on board a vessel can be determined by（）.
单项选择题 The bosun has thrown the liferaft into the water before abandoning the vessel. The operating cord（）.
