单项选择题
A.directly under the boom B.moving away from the boom C.stopped dead in the water D.tied to the boom
After the boat is at the top of the davit heads，the dav...
单项选择题After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.
A.hoist man B.limit switch C.brake handle D.preventer bar
A vessel may be unable to take proper and effective act...
单项选择题A vessel may be unable to take proper and effective action due to the speed（）too high or，in some circumstances，too low.
A.is B.is to be C.will be D.being
A tourniquet should be used to control bleeding ONLY（）....
单项选择题A tourniquet should be used to control bleeding ONLY（）.
A.with puncture wounds B.when all other means have failed C.when the victim is unconscious D.to prevent bleeding from minor wounds
