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单选题
Fires involving combustible metals are classified as （）.
A
class A fires
B
class B fires
C
class C fires
D
class D fires
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solid materials such as wood or bales of fiberB
inflammable liquidsC
electrical equipmentD
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Foam is effective on combustible metal firesD
Foam can be made with seawater or fresh water
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charted record of atmospheric pressure over timeC
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purifiesB
combinationsC
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flash pointB
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prevent the generation of flammable or combustible gas in tanksB
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prevent fires in the pumproom by continually displacing flammable vapors
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