单项选择题
The spread of fire is NOT prevented by（）.
A.shutting off the oxygen supply B.cooling surfaces adjacent to the fire C.removing combustibles from the endangered area D.removing smoke and toxic gases by ensuring adequate ventilation
单项选择题 The remote control for a fixed fire extinguishing system should be（）.
单项选择题 The record of tests and inspection of fire fighting equipment on board a ship must include（）.
单项选择题 The primary method by which water spray puts out fires is by（）.
