4. The gray squirrel, introduced into local woodlands ten years ago, threatens the indigenous population of an endangered owl species, because the squirrels’ habitual stripping of tree bark destroys the trees in which the owls nest. Some local officials have advocated setting out poison for the gray squirrels. The officials argue that this measure, while eliminating the squirrels, would pose no threat to the owl population, since the poison would be placed in containers accessible only to squirrels and other rodents.
本题的因果关系可简化为:
毒药将被放在一个只有S和其他rodents可以接触到的容器里→减少S数量的同时不会威胁到O的数量
Which one of the following, if true, most calls into question the officials’ argument?
A.One of the species whose members are likely to eat the poison is the red squirrel, a species on which owls do not prey.
B.The owls whose nesting sites are currently being destroyed by the gray squirrels feed primarily on rodents.
C.No indigenous population of any other bind species apart from the endangered owls is threatened by the gray squirrels.
D.The owls that tare threatened build their nests in the tops of trees, but the gray squirrels strip away back from the trunks.
E.The officials’ plan entails adding the poison to food sources that are usually eaten by rodents but not by other animals.
我一开始也选的B，
刚开始的理解是：
毒药被other rodents 吃了以后，这些带毒在身的r被o吃了以后o也被毒死了。
提供的解释是：r被毒死了，o的食物少了→数量减少
可是我觉得这里存在不严谨的地方：文中没有提供任何信息表明r可以被毒药毒死。
而o可以被毒药毒死我觉得是暗示的（be placed in containers accessible only to squirrels and other rodents. ）
而E选项提供的解释是：Without further information about the rodents, this choice does not bother the argument
但是我觉得official想要达到两个目的：减少S数量；不威胁o的数量。
按照E选项，毒药总是被r吃那么就达不到减少S的目的，不同样也calls into question the officials’ argument了么？？
爱妮，我觉得你的逻辑分析力好赞的哈 削弱目的措施型的题目 是要说明 措施在做，但目的达不到 1.也就是说这个计划是在做，the poison would be placed in containers accessible only to squirrels and other rodents 毒药会被放置在只有S和R接触到的容器里，这就说明和强调了毒药只能被R和S消灭掉，并且能够毒死掉， 也就不存在E说的毒药只被R吃不被S吃了，就如同解释那样没有更多的信息表明其他的r怎么样 2.目的却达不到，即没有在消灭S的同时保证不对O的生存造成威胁，这样B就很好了
爱妮，我觉得你的逻辑分析力好赞的哈 削弱目的措施型的题目 是要说明 措施在做，但目的达不到 1.也就是说这个计划是在做，the poison would be placed in containers accessible only to squirrels and other rodents 毒药会被放置在只有S和R接触到的容器里，这就说明和强调了毒药只能被R和S消灭掉，并且能够毒死掉， 也就不存在E说的毒药只被R吃不被S吃了，就如同解释那样没有更多的信息表明其他的r怎么样 2.目的却达不到，即没有在消灭S的同时保证不对O的生存造成威胁，这样B就很好了
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发表于 2012-4-25 00:01:34
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