单选题A fire of escaping liquefied flammable gas is best extinguished by（）.Acooling the gas below the ignition pointBcutting off the supply of oxygenCstopping the flow of gasDinterrupting the chain reaction
单选题
A fire of escaping liquefied flammable gas is best extinguished by（）.
A
cooling the gas below the ignition point
B
cutting off the supply of oxygen
C
stopping the flow of gas
D
interrupting the chain reaction
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