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786 Lockeport's commercial fishing boats use gill nets, which kill many of the netted fish, including some fish of endangered species. The fishing commission has proposed requiring the use of tent nets, which do not kill fish: boat crews would then throw back fish of endangered species. Profitable commercial fishing boats in similar areas have already switched over to tent nets. The proposal can therefore be implemented without economic harm to Lockeport's commercial fishing boat operators.
Which of the following, if true, casts the most serious doubt on the argument made for the proposal?
(A) In places where the use of tent nets has been mandated, there are typically fewer commercial fishing boats in operation than there were before tent nets came into use.
(B) Even when used properly, gill nets require many more repairs than do tent nets.
(C) Recreational anglers in Lockeport catch more fish of endangered species than do commercial fishing boats.
(D) The endangered species of fish in Lockeport's commercial fishing area did not become endangered as a result of the use of gill nets by fishing fleets.
(E) The endangered species of fish caught by Lockeport's commercial fishing fleet are of no commercial value.
广州申友GMAT老师Cheryl带你分析
CR题型:weaken
逻辑链:条件推理
Tent nets----throw back endangered
|
Commercial already switched
选项分析:
A. 强制使用后commercial boat比之前少了,说明强制使用过之后还是哟harm的,削弱
B. Gill nets比tent nets需要更多维修,无关比较
C. 业余钓鱼者比商船抓的endangered更多,业余跳出范畴
D. Endangered fish濒危的原因,无关
E. Endangered fish没有经济价值,无关
答案:A
难度:680-700
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