单选题If heavy smoke is coming from the paint locker,the first firefighting response should be to（）.Arelease the CO fiooding systemBopen the door to evaluate of the fireCenter and use a portable extinguisherDsecure the ventilation
单选题
If heavy smoke is coming from the paint locker,the first firefighting response should be to（）.
A
release the CO fiooding system
B
open the door to evaluate of the fire
C
enter and use a portable extinguisher
D
secure the ventilation
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