单项选择题
The sprinkler system of a survival craft is used to（）.
A.cool the craft in a fire B.cool the engine C.spray oil on the sea to calm it D.spray personnel during a fire
单项选择题 The spread of fire is prevented by（）.
单项选择题 The spread of fire is NOT prevented by（）.
单项选择题 The remote control for a fixed fire extinguishing system should be（）.
