After leaving the port, we used （）to clean the empty holds and decks.<br>A:fresh water<br>B:sea water<br>C:both A and B<br>D:ballast water

After leaving the port, we used （）to clean the empty holds and decks.
A:fresh water
B:sea water
C:both A and B
D:ballast water

出自：船舶水手证

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