单选题If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST （）.Anotify the engineer on watchBisolate and secure the pipingCthrow sand on the fireDextinguish the fire using a combination nozzle with applicator
单选题
If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST （）.
A
notify the engineer on watch
B
isolate and secure the piping
C
throw sand on the fire
D
extinguish the fire using a combination nozzle with applicator
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