一道关于假设的题目

331589698 · 发表于 2013-6-18 15:03:37

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

peby1223 · 发表于 2013-6-18 15:51:25

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

francoisyang · 发表于 2013-6-18 17:12:50

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

[逻辑小分队] 一道关于假设的题目

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