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in recent years shrimp harvests of commercial fishmen in the South Atlantic have declined dramatically in total wight. the decline is due primarily to competition from a growing number of recreational fishmen, who are able to net young shimp in the estuaries where the they mature.
A. allowing recreational fishmen to move out of estuaries into the South Atlantic.
B. requiring recreational fishmen to use large-mesh nets in their fishing .
答案是B,
请问A中提到的方法为什么不能支持盈利性目的的渔民? |
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