After finished the engine, which of valves cannot be shut off by the duty engineer?（）<br>A:fuel valve<br>B:the starting air valve<br>C:the sea chest<br>D:the main sea pump inlet valve

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

出自：海船船员证

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