单选题An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.Aa mattressBspilled liquids such as oil or paintChigh voltage electrical gearDa trash can
单选题
An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.
A
a mattress
B
spilled liquids such as oil or paint
C
high voltage electrical gear
D
a trash can
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