小弟有道题请教各位高手！！！

aqualon

为什么A不是其中的一个assumption呢？

In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities.

Each of the following is an assumption made in the argument above EXCEPT:

(A) In most major cities, air-pollution problems are caused almost entirely by local industry.

(B) Air-pollution regulations on industry have a significant impact on the quality of the air.

(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.

(D) An increase in the number of bird species in and around a city is desirable.

(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.

pinkcutie

帮顶

helo

因为题中是对local industry加以regulation,从而达到了之后的效果．这说明local industry至少是造成上述不良结果的原因之一．所以，即使不是almost entirely （Ａ），也是可以采纳最终建议的，Ａ不对．来自ＧＭＡＴ７６０的一点见解，呵呵！我不经常浏览这里，再有问题，可以ＥＭＡＩＬ：gmat_year(ａ) 163.com

铺路者

yes!

aqualon

helo, 谢了

helo

不客气,有时间留给我你的EMAIL.直接发我信箱吧!

hill1005

这题讨论过，请搜索。E对的原因是原文给的证据是seen的BIRDS增加，而结论需要的是鸟actual increase 。E填补这个GAP。A错在almost entirely 。原文需要的假设只要工业导致鸟大量减少就行，不需要AIR POLLUTION几乎都是工业造成的。比如有些非来源于工业的污染，虽污染空气，但只要不会使鸟大量减少，则是允许的,引用他人见解发表一下

aqualon

发现来这里讨论真是不错，很温暖！