单选题Convection spreads a fire by（）.Aheated gases flowing through ventilation syetemBthe transfer of heat across an unobstructed spaceCburning liquids flowing into another spaceDtransmitting the heat of a fire through the ships metal
单选题
Convection spreads a fire by（）.
A
heated gases flowing through ventilation syetem
B
the transfer of heat across an unobstructed space
C
burning liquids flowing into another space
D
transmitting the heat of a fire through the ships metal
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