狒狒真的挺难的，小题一道

canallaker

112. Older United States automobiles have been identified as contributing disproportionately to global air pollution. The requirement in many jurisdictions that automobiles pass emission-control inspections has had the effect of taking many such automobiles out of service in the United States
, as they fail inspection and their owners opt to buy newer automobiles. Thus the burden of pollution such older United States automobiles contribute to the global atmosphere will be gradually reduced over the next decade.

Which one of the following, if true, most seriously weakens the argument?


A.It is impossible to separate the air of one country or jurisdiction from that of others, since air currents circle the globe.
B.When automobiles that are now new become older, they will, because of a design change, cause less air pollution than older automobiles do now.
C.There is a thriving market for used older Untied States automobiles that are exported to regions that have no emission-control regulations.
D.The number of jurisdictions in the United States requiring automobiles to pass emission-control inspections is no longer increasing.
E.Even if all the older automobiles in the United States were retired from service, air pollution from United States
automobiles could still increase if the total number of automobiles in use should increase significantly. 答案是C 可以看懂我就不多说了，关键是我觉得D也能削弱，如果管制的车辆数目不增加，那么当管制的数量额已满时，新车不是还可以买那种污染环境的旧的款式？？？我想太多了，罪过罪过~~

canallaker

fanaf821

The requirement in many jurisdictions that automobiles pass emission-control inspections has had the effect of taking many such automobiles out of service in the United States,as they fail inspection and their owners opt to buy newer automobiles.

D.The number of jurisdictions in the United States requiring automobiles to pass emission-control inspections is no longer increasing.

注意比较原文和选项，原文说的是由于法令的影响，使得他们必须去买新车
法令数目的多少与它的影响无关，若有关，也应该有相应信息表明之间的联系
所以D中法令数目之前和现在的变化实则是一种无关比较

canallaker

The requirement in many jurisdictions that automobiles pass emission-control inspections has had the effect of taking many such automobiles out of service in the United States,as they fail inspection and their owners opt to buy newer automobiles.

D.The number of jurisdictions in the United States requiring automobiles to pass emission-control inspections is no longer increasing.

注意比较原文和选项，原文说的是由于法令的影响，使得他们必须去买新车
法令数目的多少与它的影响无关，若有关，也应该有相应信息表明之间的联系
所以D中法令数目之前和现在的变化实则是一种无关比较

-- by 会员 fanaf821 (2011/7/23 16:05:24)

哦哦，明白啦，原来是我看错了~~~谢谢