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When fueling has been completed（）.
A:the fuel tank fill pipe should be left open to allow vapors to vent from the tank
B:the engine should be started immediately to prevent vapor lock in the fuel line
C:all hatches should be opened and all compartments should be ventilated
D:open the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment

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出自：海船船员证

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