An ABC dry chemical fire extinguisher would be least effective against a fire in（）.<br>A:a mattress<br>B:spilled liquids such as oil or paint<br>C:high voltage electrical gear<br>D:a trash can

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

出自：海船船员证

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