单选题When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）ASecure all engine room doors，hatches，and ventsBClose the fuel line valveCCheck the spread of the fire with foamDCast the barge off the wharf
单选题
When possible，what is the FIRST step in fighting an engine fuel-pump fire which results from a broken fuel line?（）
A
Secure all engine room doors，hatches，and vents
B
Close the fuel line valve
C
Check the spread of the fire with foam
D
Cast the barge off the wharf
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