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Carolinesy · 发表于 2011-11-15 09:50:03

Q38:

Nitrogen dioxide is a pollutant emitted by automobiles.Catalytic converters, devices designed to reduce nitrogen dioxide emissions, have been required in all new cars in Donia since 1993, and as a result, nitrogen dioxide emissions have been significantly reduced throughout most of the country.Yet although the proportion of new cars in Donia’s capital city has always been comparatively high, nitrogen dioxide emissions there have showed only an insignificant decline since 1993.

Which of the following, if true, most helps to explain the insignificant decline in nitrogen dioxide emissions in Donia’s capital city?

A.More of the cars in Donia’s capital city were made before 1993 than after 1993.

B.The number of new cars sold per year in Donia has declined slightly since 1993.

C.Pollutants other than nitrogen dioxide that are emitted by automobiles have also been significantly reduced in Donia since 1993.

D.Many Donians who own cars made before 1993 have had catalytic converters installed in their cars.

E.Most car trips in Donia’s capital city are too short for the catalytic converter to reach its effective working temperature.

这是一道解释题，请问是不是选E呢？下载的文件里把这个答案给漏了~

vyc · 发表于 2011-11-15 09:56:26

Carolinesy · 发表于 2011-11-16 01:54:21

谢谢楼上~~

确定一道GWD逻辑答案~求关注~~

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