国际顶尖MBA申请交流平台--TOPWAY MBA

标题: GWD-14-11,疑问求解 [打印本页]

作者: Vickyliu 时间: 2011-3-13 08:59 标题: GWD-14-11,疑问求解

条件是一旦鹅被射杀的5%那么狩猎季节就结束，题目说的是降低射杀鹅的限制可以使其他物种上升，但是给的答案B说自从实施这项限制，狩猎季节结束的时间提早了

已经很多年了，难道所要表达的就是说鹅越来越少，没必要降低这个标准么？

Some species of Arctic北极的 birds are threatened by recent sharp increases in the population of snow geese鹅, which breed in the Arctic and are displacing birds of less vigorous健壮的 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?

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

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

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

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

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

作者: winny0821 时间: 2011-3-13 21:44

题目的意思应该是取消这个限制，也就是说可以杀超过5%的鹅之后，狩猎季节才结束。B的意思是比原计划的时间提前了，也就时说杀的鹅不到5%就结束了。所以是削弱。A选项无关

作者: piacia 时间: 2011-3-14 06:45

题目论据是认为射杀受限，才只杀5%,所以现在鹅的数量有增无减，应该放宽限制。

那么要削弱这个论据，应该说鹅的数量增加是另有原因，而和射杀率无关，就算降低限制，鹅数量一样会增加，这样才对。

那么B选项恰好说明这种必要性，说出了现在狩猎受限的情况，还没到5%就结束了，也就证明了上面的论据。怎么会肖弱的.

作者: piggycandys 时间: 2011-3-14 21:38

B是削弱结论，而不是论据。没到5%就结束，说明鹅的数量会多，鹅的数量多，就会影响那种鸟的数量，当然就削弱结论了。结论是说别的鸟的数量可以增加。

作者: Vickyliu 时间: 2011-3-15 21:45

可是问题问的是Which of the following, if true, most seriously undermines

the argument，而不是conclusion.

作者: staren21cn 时间: 2011-3-16 06:43

这道题目我今天做错了。

其实我在想，是不是说因为hunting season总是提早结束，所以即使drop the restriction也不能让other species of birds增加呢？因为snow geese的数量不会因为增加hunting而减少。

作者: victoria820 时间: 2011-3-16 20:03

B的意思指出那些雪雁数目大增的是近年的事，而那个只可以猎 5% 的禁例却是实行多

年了。所以禁令与雪雁的数目没有关系。

作者: templars 时间: 2011-3-17 06:47

根据国外论坛的解释——Option B says: that restriction of 5% has never been reached, so dropping that restriction would have no effect on the Expected Outcome and hence plan will fail.

我是这么理解的：多年的事实表明，狩猎都是提早结束的，snow geese减少的数量也从来没超过5%的限制。所以，根据往年的经验，即使没有了这样的限制，5%的数量也很难会达到。也就是说，geese的数量还是会多，不会少到哪去，因此也不会让other species的数量恢复，hence削弱。

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