单项选择题
A.Class "A" B.Class "B" C.Class "C" D.Class "D"
Besides heat, fuel, and oxygen, which of the following ...
单项选择题Besides heat, fuel, and oxygen, which of the following is necessary for a fire to exist?（）
A.Chain reaction B.Thermal action C.Chemical occlusion D.Pyrotechnical reaction
A fire and boat drill on a tank vessel shall, by regula...
单项选择题A fire and boat drill on a tank vessel shall, by regulation, include （）.
A.starting the fire pumps B.checking firemans outfits and other personnel rescue equipment C.checking relevant communications equipment D.All of the above
A fire in an electrical generator is considered to be （...
单项选择题A fire in an electrical generator is considered to be （）.
