The Master of a cargo or tanker shall be responsible that each lifeboat，except those free-fall launched，is lowered to the water with crew and maneuvered at least once every（）.<br>A:week<br>B:month<br>C:three months<br>D:year

The Master of a cargo or tanker shall be responsible that each lifeboat，except those free-fall launched，is lowered to the water with crew and maneuvered at least once every（）.
A:week
B:month
C:three months
D:year

出自：海船船员证

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