Two individuals authorized to serve as a lifeboatman must be assigned to any lifeboat that has a capacity of more than（）.<br>A:10 persons<br>B:20 persons<br>C:30 persons<br>D:40 persons

Two individuals authorized to serve as a lifeboatman must be assigned to any lifeboat that has a capacity of more than（）.
A:10 persons
B:20 persons
C:30 persons
D:40 persons

出自：海船船员证

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