单选题After finished the engine, which of valves cannot be shut off by the duty engineer?（）Afuel valveBthe starting air valveCthe sea chestDthe main sea pump inlet valve
单选题
After finished the engine, which of valves cannot be shut off by the duty engineer?（）
A
fuel valve
B
the starting air valve
C
the sea chest
D
the main sea pump inlet valve
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