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单选题
After extinguishing a fire with CO2，it is advisable to（）.
A
use all CO2 available to cool the surrounding area
B
stand by with water or other agents
C
thoroughly ventilate the space of CO2
D
jettison all burning materials
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单选题After extinguishing a fire with C02,it is availabe to（）.A
use all CO2 available to cool the surronding areaB
stand by with water or other agentsC
thoroughly ventilate the space of CO2D
jettison all buring materials
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