单项选择题

Which hazard probably would NOT be encountered when entering an empty but uncleaned fish hold?（）

A.Lack of oxygen
B.Methane gas
C.Hydrogen sulfide gas
D.Carbon monoxide

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单项选择题

When starting CPR on a drowning victim，you should（）.

A.start chest compressions before the victim is removed from the water
B.drain water from the lungs before ventilating
C.begin mouth-to-mouth ventilations as soon as possible
D.do not tilt the head back since it may cause vomiting

单项选择题

When carrying out a parallel track search pattern，the course of the search units should normally be which of the following?（）

A.In the same direction as the anticipated drift
B.In the opposite direction of the anticipated drift
C.Perpendicular to the line of anticipated drift
D.Downwind