The certificate of pratique certifies that （）.<br>A:the ship has no rats or mice on board<br>B:no quarantinable disease has been found on the vessel<br>C:no person has died during the voyage the ship has just completed<br>D:all the crew members have no health problem

The certificate of pratique certifies that （）.
A:the ship has no rats or mice on board
B:no quarantinable disease has been found on the vessel
C:no person has died during the voyage the ship has just completed
D:all the crew members have no health problem

出自：海船船员证

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