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标题: 请教T-3-Q21. [打印本页]

作者: sherilynchi 时间: 2012-10-18 07:04 标题: 请教T-3-Q21.

T-3-Q21.

Driving the steep road to the mountaintop Inca ruins of Machu Picchu

is potentially dangerous and hiking there is difficult. Now the Peruvian government is installing a cable car that will make access much easier, and hence results in a large increase in tourisms. However, since the presence of large numbers of tourists tends to accelerate the deterioration of a site, installation of a cable car is certain to result in harm to the ruins.

Which of the following, if true, most seriously calls into question the argument?

A.The daily number of tourists that are expected to take the cable car to Machu Picchu

is smaller than the original resident

B.The construction of the cable car terminal at Machu Picchu

will require the use of potentially damaging heavy machinery at the site.

C.Machu Picchu

is already one of the most popular tourist sites in Peru

D.Natural weathering will continue to be a more significant cause of the deterioration of Machu Picchu

than tourist traffic

E.The cable car will replace the tour buses whose large wheels and corrosive exhaust at present do significant damage to the site.

答案是E。但是为什么D不是呢？D不是也是他因么？

作者: purpleelf 时间: 2012-10-18 21:29

我也同求啊，刚刚做了GWD，发现这题错了！希望哪位可以指点一下迷津！谢谢！

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