[讨论]马上要考试了, 有1道逻辑题请教

James_007

马上要考试了, 有1道逻辑题请教:

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 (spend 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.

Displace sth: move sth out of their original residence. (uproot)

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

Official D.    Mine:  E

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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.

Why D, why not E ?

NN help !

jeffshixj

Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese...

In D,... snow geese have recolonized wintering grounds that they had not used for several seasons. Thus weaken the conclusion of "Clearly, dropping this restriction would allow the other species to recover."

sensornet

题设说那个snow geese数量的增加危害别的种类的鸟。又说，那个地方arctic有禁猎令，不许成天打snow geese。结论，要是没禁猎令，别的种类的鸟的数量就会恢复。为啥？因为猎人都打snow geese，它们都死翘翘了就不会威胁别的种类的鸟了。

看到这里，应该反映出一个undermine,就是猎人不象德国人那样盯住一种鸟死抓不放，鸟要是哪天染发了，跳到德国人面前table dancing德国人都不打。以上为废话，就是说，猎人不但打snow geese,还打别的鸟。可是选项没有，而且也可能被文中popular quarry给否决了。所以咋办？文中还有个gap,就是你打你打，你打不到。我打不死我，我就还能威胁别的鸟。就像题里面说的，我跑到别的地方躲你，转年我胡汉三又回来了。ok,这条理由比较下三烂，但没办法，我也是看你给的答案才想到的。所以说，兄弟，贴题别先贴答案。

另，这是啥题? GWD? 或者有是啥内部真题？

[此贴子已经被作者于2005-7-22 6:19:08编辑过]

howardwang

结论是说，如果dropping this restriction ,那么allow the other species to recove.所以，e与此结论无关，而d说，have recolonized wintering grounds，所以即使dropping this restriction ，有些species 也无法 recove.所以d正确。

James_007

GWD 题

[此贴子已经被作者于2005-7-22 14:23:13编辑过]