GWD-7-14?

Q14:

Certain politicians in the country of Birangi argue that a 50 percent tax on new automobiles would halt the rapid increase of automobiles on Birangi’s roads and thereby slow the deterioration of Birangi’s air quality.  Although most experts agree that such a tax would result in fewer Birangians buying new vehicles and gradually reduce the number of automobiles on Birangi’s roads, they contend that it would have little impact on Birangi’s air-quality problem.

Which of the following, if true in Birangi, would most strongly support the experts’ contention about the effect of the proposed automobile tax on Birangi’s air-quality problem?

1. Automobile emissions are the largest single source of air pollution.


2. Some of the proceeds from the new tax would go toward expanding the nonpolluting commuter rail system.


3. Currently, the sales tax on new automobiles is considerably lower than 50 percent.


4. Automobiles become less fuel efficient and therefore contribute more to air pollution as they age.


5. The scrapping of automobiles causes insignificant amounts of air pollution.

   Answer:  是B，为什么呢？增加无污染的铁路系统能怎么样呢？

我认为D较好。

专家观点是：加税对空气污染问题的解决作用不大，即污染还一样严重（实际是车辆减少对污染问题的解决作用不大，因专家已承认加税会减少车辆）。

背景知识（没太多的理由，这种题只要选项对该观点其问题所说的作用即可）：政治家ARGUE要加税，说可以减少污染。专家承认加税可减少车量。

正确答案D：虽然新车进入少，但现有的车随着老化，污染更严重，所以污染仍然大，仍然没有好转。故SUPPORT专家观点。

A。无关。车辆是否是最大污染源与专家观点无关

B。无关，最好是WEAKEN。扩大地铁系统也许会使车辆减少减少量大些，从而使空气污染少些。

C。无关

E。无关

我觉得应该选E，专家的contention 是 little impact，而并不是污染增加或是减少的问题。而且D和E相比在support “little impact”上显然是E更有效。而且little impact 和 E中的 insignificant 恰巧构成一种对应。请NN指教

      i think the question is very easy

      D is the best choice

      B tends to weaken the conclusion.

      E is fully wrong. experts argued that imposing a 50% tax on new automobiles may not adress the issue of air pollution. choice E tell us that ruined automobiles cause insignificant air pollution. thus choice E also tends to weaken the experts' conclusion.

感觉E更合适一些。请NN指教。

专家认为tax提高虽然能减少汽车的数量，但是不会对空气质量有太大的影响。而E说明汽车不是空气污染的主要来源，因此汽车减少不会对空气质量有大的帮助。正是对专家看法的最好的SUPPORT。

不对吗？实在想不明白。