请教GWD18-12

cloudmist2004

Q12:

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.

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

Hunting limits for snow geese were imposed many years ago in response to a sharp decline in the population of snow geese.

It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.

The number of snow geese taken by hunters each year has grown every year for several years.

As their population has increased, snow geese have recolonized wintering grounds that they had not used for several seasons.

In the snow goose’s winter habitats, the goose faces no significant natural predation.

这题的答案是什么呀？请NN分析一下吧

felix_zheng

不是NN.

答案是B.但我认为应该是C.

请大家讨论!

mushroom_111

以下是引用felix_zheng在2005-11-24 20:52:00的发言：

不好意思.说得不对的地方,请帮忙改正.

It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date

B是说该限制导致对SG的捕猎期比预定时间更早结束,而这一限制已经实施很多年了.那么如果取消的话,对SG的捕猎期无疑会变的比以前长,那么(对于其他鸟的生存)不是有莉吗/.??

mushroom_111

但是我觉得C项也不对，我的理解是：被捕杀时就增多，不捕杀就更多了。

felix_zheng

SORRY.C wrong.答案还是B.

It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.(只是给的红色部分没有会更好理解,加红色变为只对SG的捕杀期,其实应该是对所有动物)

mushroom_111

以下是引用116559在2005-11-24 23:48:00的发言：

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。

tinabeauty1984

题没太读懂，试着分析一下

题中说geese多了，威胁Some species of Arctic birds。原来有一个限制，就是当geese的population减少5%就要停止hunting,结论是取消这个限制就能 allow the other species to recover.

答案c 说 其实限制实行好多年以来停止hunting的日期都比规定日期要早。-----所以即使这个限制取消了，也起不到什么作用，就削弱结论拉

不知道对不对

riverhouse

我也有疑问，答案是B，我想不明白这里面的逻辑关系。请大家讨论

riverhouse

刚才我的机子上没有显示出大家的讨论，还以为没有讨论过呢。sorry

benman

大家可能对B选项的翻译有误解

B选项的意思是， The restriction led to the hunting season for snow geese being closed earlier than the scheduled date. This phenomenen happend many years ago. But it disappered now!!! That is to say,whether to impose the restriction is not relevant to the change of  snow geese population, undermining the argument most.

C: 是加强阿，本来就增加了，取消管制不是增加得更多了吗

D：irrelevant 还有一点加强的感觉