单项选择题
During a fire drill on a ship，what action is required?（）
A.Start each fire pump B.Launch and run a lifeboat C.Inventory rescue and fire equipment D.Inspect fire hoses
单项选择题 Due to the hazards involved with Halon extinguishers on a ship，the size II extinguisher may only be used（）.
单项选择题 Dry chemical fire extinguishers are effective on which type(s) of fire?（）
单项选择题 Dry chemical extinguishers extinguish class B fires to the greatest extent by（）.
