单项选择题
A.Fuel oil B.Wood C.Celluloid D.Electrical insulation
Except in rare cases, it is impossible to extinguish a ...
单项选择题Except in rare cases, it is impossible to extinguish a shipboard fire by （）.
A.removing the heat B.removing the oxygen C.removing the fuel D.interrupting the chain reaction
A class "C" fire is burning （）.A.diesel oilB.magnesiumC...
单项选择题A class "C" fire is burning （）.
A.diesel oil B.magnesium C.dunnage D.electrical insulation
A class "C" fire would occur in （）A.beddingB.pipe insul...
单项选择题A class "C" fire would occur in （）
A.bedding B.pipe insulation C.paint D.a generator
