A foam-type portable fire extinguisher is most useful in fighting a fire in().
A、generators
B、oil drums
C、the bridge controls
D、combustible metals
A、generators
B、oil drums
C、the bridge controls
D、combustible metals
A、solid materials such as wood or bales of fiber B、inflammable liquids C、electrical equipment D、metallic solids
A、solid materials such as wood or bales of fiber B、flammable liquids C、electrical equipment D、metallic solids
A、solid materials such as wood or bales of fiber B、inflammable liquids C、electrical equipment D、metallic solids
A、solid materials such as wood or bales of fiber B、flammable liquids C、a piece of electrical equipment D、combustible metallic solids
A、soild materials such as wood or bales of fiber B、flammable liquids C、a piece of electrical equipment D、combustible metallic solids
A、Dry chemical and carbon dioxide B、Foam (stored pressure) and soda-acid C、Carbon dioxide and foam (stored pressure) D、Dry chemical and soda-acid