单项选择题
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（）.
单项选择题 When a rescue vessel approaches a lifeboat in heavy seas，the person in charge of the lifeboat should（）.
单项选择题 Under the International Code of Signals how are geographical locations such as New York City transmitted（）.