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标题: 请教T3-Q24 [打印本页]

作者: bradfordchen 时间: 2011-7-4 06:39 标题: 请教T3-Q24

T-3-Q24. （答案是A，不明白，请NN帮忙给看看，非常感谢~~）
Each year red-winged blackbirds stop in a certain region of Midland
Province on their spring and fall migration. In the fall, they eat a significant portion of the province’s sunflower crop. This year Midland farmers sought permits to set out small amounts of poisoned rice during the blackbirds’ spring stop in order to reduce the fall blackbird population. Some residents voiced concern that the rice could threaten certain species of rare migratory birds. Nevertheless, the wildlife agency approved the permits.

Which of the following, if true, most helps to justify the wildlife agency’s approval of the permits, given the concern voiced by some residents?

A.
In the region where the red-winged blackbirds stop, they are the first birds to be present in the spring.

B.
The poison that farmers want to use does not kill birds but rather make them incapable of producing viable eggs.

C.
Since rice is not raised in midland province, few species of birds native to the province normally eat rice.

D.
Without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined

E.
The poison that farmers got approval to use has no taste or smell that would make it detectable by birds.

作者: mop000 时间: 2011-7-4 22:12

原文中给出了 “投放的有毒粮食是较少的”和“红翅黑鹂red-winged blackbirds量很多 ”（可以从它们吃很多向日葵推断出），C给出了这种鸟在迁徙时第一批到，因此投少量毒的行为是可以达到减少这种鸟数量的目的的。C在所有观念中对结论的帮助最大，其他选项相关性小。GMAT逻辑最终的结果不是完美的，只是相对比较好的。本题逻辑要想丰满，必须满足1，这种鸟迁徙时第一批到；2，这种鸟趁别的鸟到来时吃光了这种有毒的粮食；3被毒死的鸟不会对后来的鸟有影响。C给出了其中一个条件，比起其他选项来足够了

作者: thinkingape 时间: 2011-7-5 06:41

同意A
因为说的是small amount of poisoned rice嘛所以他们先来就把这些有毒的吃光光了。其他鸟儿来的时候就莫有了
B
导致他们不能生蛋----可能会threaten to rare migitary birds 因此B 错
C D E 都无关。。

作者: Fuckitup 时间: 2011-7-5 20:41

y原文说Some residents voiced concern that the rice could threaten certain species of rare migratory birds，题目其实问的是要反对这句话，即反对大米对威胁某种稀有的迁徙鸟类

B. The poison that farmers want to use does not kill birds but rather make them incapable of producing viable eggs.
B提到农民使用的毒药的特性，并不能体现出不威胁那种稀有的鸟类

C. Since rice is not raised in midland province, few species of birds native to the province normally eat rice.
文中说的certain species of rare migratory birds，而C选项说到的本地鸟的事也不能体现出不威胁那种稀有的鸟类

D. Without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined
罚款不罚款并不能体现不威胁那种稀有的鸟类

E. The poison that farmers got approval to use has no taste or smell that would make it detectable by birds.
鸟能不能觉察到毒药的气味还是不能体现不威胁那种稀有的鸟类
综上所述，只有A才提到了red-winged blackbirds和那种稀有鸟类的关系

作者: rockstonexS 时间: 2011-7-6 06:32

这道题就是blackbirds和certain species of rare birds之前的事么

作者: yayajiaojef 时间: 2011-7-8 21:36

可是，原文说的是 in order to reduce the fall blackbird population. 为了减少秋天blackbirds 的数量，A是春天的事情，也无关啊。。。。。。。。。。。。。。。。。

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