單項(xiàng)選擇題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


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1.單項(xiàng)選擇題A survival craft being used to pick up a person who has fallen overboard from a vessel should approach the person().

A.at a high rate of speed
B.under oars
C.against the wind
D.with the wind

2.單項(xiàng)選擇題A snag or other underwater obstruction may form a().

A.V-shaped ripple with the point of the V pointing upstream
B.V-shaped ripple with the point of the V pointing downstream
C.small patch of smooth water on a windy day
D.smoothing out of the vessel's wake