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题库 / Prep2007E1-CR-47
Automobile emissions are a significant source of air pollutants, and cars over five years old typically generate significantly greater amounts of pollutants than newer cars. In Torinia, which has recently built its first automobile manufacturing plant, most cars are over five years old. Aiming to boost Torinia's economy and reduce air pollution, the government plans to introduce incentives for Torinians to scrap their old cars every five years and replace them with new ones.
Which of the following, if true, most seriously undermines the likelihood that the planned incentives, if implemented, will achieve both of the cited aims?
Without the implementation of the planned incentives, most Torinians who own an old car would be unlikely to buy a new car.
Torinia's automobile plant manufactures car models that typically generate smaller amounts of air pollutants than most similarly sized car models manufactured elsewhere.
The new cars produced in Torinia are not likely to be exported to other countries.
The largest source of atmospheric pollutants in Torinia is not automobile emissions, but emissions from power plants.
The manufacture and the scrapping of cars each generate significant amounts of air pollutants.
紧紧抓住conclusion：conclusion是鼓励每5年换车，可以增加经济和减少排放物，题目是weaken，选项只要说出这个计划不能同时满足两个目标的即可
d选项错选：其实d选项是无关选项，与结论无关
e选项是，说明方案有副作用，就是scrap和制造更多的车，会不能满足reduce emissions
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