单选题Flame screens are used to（）.Acontain flammable fumesBprotect firefighters from flamesCprevent flames from entering tanksDkeep flames and sparks from getting out of an engine's exhanst system
单选题
Flame screens are used to（）.
A
contain flammable fumes
B
protect firefighters from flames
C
prevent flames from entering tanks
D
keep flames and sparks from getting out of an engine's exhanst system
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