GWD 17-11 帮忙看看吧

Q11:

Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species.  Although snow geese are a popular quarry for hunters in the southern regions where they winter, the hunting season ends if and when hunting has reduced the population by five percent, according to official estimates.  Clearly, dropping this restriction would allow the other species to recover.

当狩猎数量是总数量减少５％时，狩猎期被禁止＝〉结论，放弃这个制度可以给别的种族的鸟留下ｒｅｃｏｖｅｒ的机会（其中暗含一个过渡：放弃制度会使天鹅受到捕杀的增多）

Which of the following, if true, most seriously undermines the argument?

先谢，but still did not get it.

How can you get the information"it can not be close early in this year" from B?

i dont understand this question either..

argument: Clearly, dropping this restriction would allow the other species to recover.

B It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.　 --> does that mean for so many years, snow geese have been reduced by 5% by hunters?

我也很不明白这个选项，看得我一头雾水，既然Restriction让打猎结束日期提前了，goose的数量得到了保护，那么自然会得到越来越多的goose越来越威胁到了一些其他的species，怎么还是weaken呢？

同问

NN什么时候来啊

大家顶啊

选b: 1） 文章说只要when hunting has reduced the population by five percent，那么hunting season 就会结束，因此，不论是提前结束还是按时结束，都会产生一个相同的结果，就是population of the snow geese was reduced by five percent. 2）文章还有snow geese are a popular quarry for hunters 所以在hunting season 其他birds 也是会捕杀的。由 1，2 可得 hunting season 的提前结束，会给其他birds更多的时间来recover.所以restriction是有利的，也就weaken了结论。

joey的推理有漏洞， B "连续很多年因为这项政策导致狩猎期提前结束=〉被捕杀得天鹅少了" 没根据，文章只说了一个相对数 five percent,绝对数的变化是推不出来的。

                                     C "被捕杀天鹅的天鹅每年数目都在增多" 又忘了文章中的相对数 five percent，捕杀的是多了，那是因为总量也大了嘛。那剩下还活着的也多了呢，呵呵。