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题库 / Prep2007E1-CR-5
Tiger sharks are common in the waters surrounding Tenare Island. Usually tiger sharks feed on smaller sharks, but sometimes they have attacked tourists swimming and surfing at Tenare's beaches. This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues. In order to help the economy, therefore, the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.
Which of the following, if true, most strongly calls into question the likelihood that implementation of the mayor's proposal will have the desired consequence?
Even if not all the tiger sharks that come close to the beaches are killed, the existence of the program would reassure tourists.
Business owners who depend on tourism are willing to pay most of the cost of implementing the program.
Tourists come to Tenare Island for its beaches, even though the island features a number of other tourist attractions.
The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.
Not all tourists who come to Tenare Island enjoy swimming or surfing.
副作用！！！ 这个action对于计划有副作用，目的是帮助经济，方案是杀大鱼，方向3个，1，没有效果，2，无法执行，3，有副作用，选项d，杀掉大鱼，就更多小鲨鱼是小鱼，导致最重要的fishing industry受损，就是副作用
没懂，Tiger sharks prey feed on small sharks, 如果猎杀Tiger sharks，不是对small sharks的数量增长是有帮助的吗？为什么会call into question 呢?
1.题目暗示了，有比鲨鱼观光更大的产业：渔业。
2.副作用提到了观光业增加的副作用，渔业的变化。
D的选项没看懂： The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.
目的：帮助经济 方案：杀虎鲨
注意文中已经说到fishing才是最重要的产业，D选项指出杀虎鲨的副作用，会带来fish减少，伤害经济
前提：捕鱼业是第一大盈利，旅游业是第二大。最终目的是帮助经济增长，想要杀虎鲨增加旅游业收入。问削弱，杀虎鲨＝》小鲨鱼增多＝》小鲨鱼吃鱼＝》第一大盈利点捕鱼业业绩变少＝》旅游业经济增长，捕鱼业经济下降＝》经济可能不增长。
虎鲨吃的小鲨鱼会吃别的对经济很重要的鱼类
The small sharks （on which tiger sharks prey） feed on fish （that are commercially important to the island's fisheries.） 看清句子的成分
P：虎鲨影响旅游业
C：杀光虎鲨
削弱方向：杀光虎鲨会对goal带来副作用
答案：虎鲨吃的小鲨鱼会吃那些有经济效益的鱼
另一种渔业中small sharks活下来会吃掉其他鱼 影响经济
【计划削弱题】
in onder to...
原文中包含两方面：渔业和旅游业 最终计划中只提到一种
削弱条件：另一种！！
which is second only to its fishing industry in annual revenues
Goal:为了帮助经济 Plan:建议杀掉所有的sharks
注意看目标是帮助整个经济，经济包括了tourism和fishing两块
The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries. 看清句子的成分
看仔细来还有个fishing industry
请问你考过了不？感觉经常看到你的发言哈哈
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方案推理。
目标：to help the economy
方案：the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.
D. The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.
tiger sharks少了 → small sharks多了 →fish就会变少 (而这个fish对于economy至关重要) → economy可能受到影响
属于CQ3：方案的否定性副作用
方案：为了保护经济
而经济中渔业重要性大于旅游业。方案会损害渔业所以不可行。
方案可行性问题，D，如果tiger shark被捕杀，small shark就会吃其他的鱼，导致岛上经济出现问题。
E 错误，不要质疑premise, premise “ This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues.” 是已知事实。
方案模式：为了保护经济，经济的排名如下：
1.fishing industry in annual revenues
2.tourism industry
方案不可行，因为会损害渔业
E 错误，不要质疑premise, premise “ This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues.” 是已知事实。
Tiger sharks are killed---Smaller sharks will increase---This will decrease the number of fishes that are commercially important to the island's fisheries. (smaller sharks feed on them thus their number will decrease)
Thus, Sharks decrease---smaller shark increase----other fishes decrease