单项选择题
Immediately after abandoning a vessel, lookouts should be posted aboard liferafts to look for（）
A.survivors in the water B.food and water C.land D.bad weather
单项选择题 When administering artificial respiration to an adult, the breathing cycle should be repeated about （）
单项选择题 When administering artificial respiration, it is of the utmost important to （）
单项选择题 Safety is dependent on orderliness and cleanlinessOrder may be maintained by （）
