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
第1题
A.solid materials such as wood or bales of fiber
B.flammable liquids
C.a piece of electrical equipment
D.combustible metallic solid
第2题
A.pronounced local heating
B.wind being pushed up a mountain
C.a warm air mass rising over a cold air mass
D.an increased lapse rate caused by advection of warm surface air
第3题
A.water
B.foam
C.the range hood extinguishing system
D.fire dampers
第4题
A.cyclone
B.anticyclone
C.cold front
D.occluded front
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