【OG24-737题】In parts of the Caribbean, the manatee, an endangered marine mammal, has long been hunted for its meat. Having noted the manatee hunters’ expert knowledge of manatees’ habits, local conservationists are encouraging the hunters to stop hunting and instead to take tourists on boat rides to see manatees. Tourist interest is high, so the plan has promise of achieving the twin goals of giving the former hunters a good income and helping ensure the manatees’ survival.Which of the following, if true, raises the most serious doubt about the plan’s chance of success?_mofa留学圈mofaGRE在线题库系统_GRE在线搜题_GRE题库解析_GRE真题机经_GRE课程_GRE培训机构

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In parts of the Caribbean, the manatee, an endangered marine mammal, has long been hunted for its meat. Having noted the manatee hunters’ expert knowledge of manatees’ habits, local conservationists are encouraging the hunters to stop hunting and instead to take tourists on boat rides to see manatees. Tourist interest is high, so the plan has promise of achieving the twin goals of giving the former hunters a good income and helping ensure the manatees’ survival.

Which of the following, if true, raises the most serious doubt about the plan’s chance of success?

Some tourists who visit these parts of the Caribbean are uninterested in manatees and would not be willing to pay what the former manatee hunters would have to charge for boat rides to see manatees. Recovery of the species would enable some hunting to continue without putting the manatees’ survival in jeopardy again. In areas where manatees have traditionally been hunted for food, local people could easily replace the manatee meat in their diets with other foods obtained from the sea. There would not be enough former manatee hunters to act as guides for all the tourists who want to see manatees. To maintain their current income, manatee hunters who switched to guiding tourists would have to use far larger boats and make many more trips into the manatees’ fragile habitat than they currently do.

正确答案： E

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题干翻译
注意到海牛猎手对海牛习性的专业知识，当地环保主义者鼓励猎手停止捕猎，转而带游客乘船观赏海牛。游客兴趣高，所以该计划有望实现给前猎手好收入和帮助确保海牛生存的双重目标。 逻辑链
Hunters guide tourists → Good income & Manatee survival 问题类型
削弱题 推理过程
计划是让前猎手带游客看海牛来实现两个目标，需要找到能说明该计划无法达成这两个目标的选项。 选项分析
A选项：一些游客对海牛不感兴趣且不愿支付费用。但原文提到游客兴趣高，且只是部分游客情况，不能有力削弱计划，排除。 B选项：物种恢复后可继续捕猎且不危及海牛生存。与当前计划能否实现两个目标无关，排除。 C选项：当地人饮食可替代海牛肉。与计划中前猎手带游客及两个目标的实现无直接关联，排除。 D选项：前猎手数量不够为所有想看海牛的游客当导游。只是从导游数量角度说，未从根本上影响计划实现两个目标，削弱力度弱，排除。 E选项：为维持当前收入，转做导游的海牛猎手需用更大船只且更多次进入海牛脆弱栖息地。这既可能影响海牛生存，又可能因进入栖息地次数多影响猎手收入目标，有力削弱了计划，当选。

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