你可能感興趣的試題

單項(xiàng)選擇題

Regular foam can be used on all but which flammable liquid?（）

A.Motor gasoline
B.Jet fuel
C.Crude petroleum
D.Alcohol

單項(xiàng)選擇題

Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.

A.authorized fire equipment servicing personnel only
B.replacing the propellent cartridge and refilling with powder
C.puncturing the cartridge seal after installation
D.recharging the cartridge and refilling it with powder