gwd 7 14 (已查前帖 D選項思維整理)

Kath1985

GWD-7-14 zai
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?

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

B  Some of the proceeds from the new tax would go toward expanding the nonpolluting commuter rail system.
C  Currently, the sales tax on new automobiles is considerably lower than 50 percent.
D   Automobiles become less fuel efficient and therefore contribute more to air pollution as they age.
E   The scrapping of automobiles causes insignificant amounts of air pollution.

是D
我對D的理解是這樣
無論new cars 或 old cars(注意題目寫new automobiles的範圍包括new cars和old cars) 都會隨著使用年數增長而不省油 造成對空氣更多污染
也就是說 old cars + new cars=automobiles  兩者的排放量都因年紀增長 對空氣造成雙倍污染

請問這樣理解適當嗎?

阿汤

我觉得你的理解应该是正确的。
因为原句说in fewer Birangians buying new vehicles ，就是少买了新的车辆。
D答案说，as they age.随着时间的增长，车会便得越来越没有燃油的效率。
support的题目充分必要都可以做条件。这个条件支持了that it would have little impact on Birangi’s air-quality problem.这个结论