一道关于假设的题目

331589698

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.







答案是A，求解

francoisyang

A选项的almost entirely说得太过，哪怕只有一半，也可以影响重大。

peby1223

这题其实很简单楼主：

premise1 : In the years since the city of London imposed strict air-pollution regulations on local industry
                在最近几年，因为伦敦对当地的工业施加了很严格的空气污染管理条例

premise2 : the number of bird species seen in and around London has increased dramatically
                   在伦敦市中心和周围，能被看到鸟类的种类增加得非常多

conclusion: Similar air-pollution rules should be imposed in other major cities
               
                      相似的严格的空气污染管理条例应该被施加在其他大城市

premise1 + premise2 →conclusion，很显然一步无法推出
因为箭头上有一些gap，比如后四个选项是作者默认确认的假设：
(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.

A选项是一个无关选项，因为文中只提到了air-pollution regulations，而未提到air pollution的事情