单选题In case of fire, （）.Ainform the bridge and give the alarm at onceBcut off the circuits and turn off ventilating blowers firstCcall the captain firstDreport to the duty officer
单选题
In case of fire, （）.
A
inform the bridge and give the alarm at once
B
cut off the circuits and turn off ventilating blowers first
C
call the captain first
D
report to the duty officer
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