When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.<br>A:over the top of the flames<br>B:off a bulkhead into the fire<br>C:in front of the fire<br>D:at the base of the fire

When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.
A:over the top of the flames
B:off a bulkhead into the fire
C:in front of the fire
D:at the base of the fire

出自：海船船员证

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