A vessel showing a rigid replica of the International Code flag “A” is engaged in（）.<br>A:diving operations<br>B:dredging<br>C:fishing<br>D:mineclearance operations

A vessel showing a rigid replica of the International Code flag “A” is engaged in（）.
A:diving operations
B:dredging
C:fishing
D:mineclearance operations

出自：海船船员证

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