再问T-3-Q24

freelaneliu

1.         T-3-Q24.
                    

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?

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

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

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

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

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

答案选A，C为何不对？

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

我觉得A可以算是一个答案，但是C也没有错啊，而且跟文章中的结论贴的更近

因为担心伤害rare migratory birds，所以不同意用posioned rice。

C排除了这种可能，以为rare migratory birds根本就不会去吃！

native to the province 与 certain species of rare migratory birds其实是一个意思不同说法，也不存在无关。

不知道哪位NN可以加以解释？

PS：这道题怎么在GWD讨论版里对不上号？难道前人没讨论吗？只找到了一个没什么实质内容的帖子。

hughlv

C选项是有问题的。翻译过来的意思是：因为这些米不是Midland Province生产的，所以基本上该Province的本地鸟都不吃这些米。

回头看题干，没有任何地方说明rare migratory birds是本地的，因此很有可能这些珍稀的迁移鸟类还是会去吃这些毒米的。

A提供了很完美的证据：最先吃到这些毒米的一定是red-winged blackbird，因为他们每年春天都是第一批到达。他们把毒米吃光了后来的其他鸟就安全了。

freelaneliu

明白了，我承认rare migratory birds这里的理解有问题，以为是很少迁移的鸟，也就是native鸟了。

多谢楼上的

opos

原来如此

[此贴子已经被作者于2009/8/3 11:49:57编辑过]

AnyaAnya

可是就算它是第一批到的鸟也不能保证别的鸟就吃不到这种米吧~ 不过答案只有A了

哎 我就喜欢纠结

milojin

我也理解成不怎么迁徙的鸟了??