单选题To prevent the spread of fire by convection you should （）.Aremove combustibiles from direct exposureBcool the bulkhead around the fireCclose all openings to the areaDshut off electrical power
单选题
To prevent the spread of fire by convection you should （）.
A
remove combustibiles from direct exposure
B
cool the bulkhead around the fire
C
close all openings to the area
D
shut off electrical power
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