单项选择题
When fighting a spreading fire resulting from a broken fuel line, you should FIRST （）.
A.look for a CO2 extinguisher B.use a soda acid extinguisher C.shut off the fuel supply D.smother the fire with rags
单项选择题 The three basic elements necessary for any fire are （）.
单项选择题 Engines for lifeboats are required to have sufficient fuel to operate for how many hours?（）
单项选择题 If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST （）.
