When the ships is going to enter into the harbor,（）.<br>A:change from diesel oil to heavy fuel oil for mail engine<br>B:pump out bilge water<br>C:change sea chest form lower level one to high level one<br>D:test emergency generator

When the ships is going to enter into the harbor,（）.
A:change from diesel oil to heavy fuel oil for mail engine
B:pump out bilge water
C:change sea chest form lower level one to high level one
D:test emergency generator

出自：海船船员证

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