单选题What is the most vulnerable part of the fire main system on board an offshore rig?（）AThe fire pumpBExposed hard pipingCThe hydrant valveDThe fire hose
单选题
What is the most vulnerable part of the fire main system on board an offshore rig?（）
A
The fire pump
B
Exposed hard piping
C
The hydrant valve
D
The fire hose
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