2012GRE作文范文:GRE作文范文大全(110)
Thirdly', even if I were to concede that pollution caused Yosemite's amphibian decline, this
single sample is insufficient to draw any general conclusion about the reason for a worldwide
amphibian decline. It is entirely possible that the cause-and-effect relationships in Yosemite
are not typical of the world in general. Without additional samples from diverse geographic
locations, I cannot accept the author's sweeping generalization about the decline of
amphibians and global pollution.
In sum, the scant evidence the author cites proves nothing about the reason for the general
decline of amphibians worldwide; in fact, this evidence only serves to refute the author's own
argument. To strengthen the argument the author should examine all changes occurring in
Yosemite between 1915 and 1992 and show that air and water pollution have at least
contributed to the park's amphibian decline. In any event, the author must provide data about
amphibian population changes and pollution at diverse geographical locations; and this data
must show a strong inverse correlation between levels of air and water pollution and
amphibian populations worldwide.
Argument 39
The following is a letter to the editor of the Atticus City newspaper.
"Former Mayor Durant owes an apology to the city of Atticus. Both the damage to the River
Bridge, which connects Atticus to Hartley, and the traffic problems we have long experienced
on the bridge were actually caused 20 years ago by Durant. After all, he is the one who
approved the construction of the bridge. If he had approved a wider and better-designed
bridge, on which approximately the same amount of public money would have been spent,
none of the damage or problems would have occurred. Instead, the River Bridge has
deteriorated far more rapidly over the past 20 years than has the much longer Derby Bridge up
the river. Even though the winters have been severe in the past several years, this is no
excuse for the negligence and wastefulness of Durant."
This editorial concludes that Mayor Durant's approval of the River Bridge construction 20
years ago was the cause of current traffic and deterioration problems at the bridge. To support
this conclusion, the editorial points out that a nearby bridge is not experiencing similar
problems. However, the editorial relies on a number of doubtful assumptions and is therefore
unconvincing. 感谢您阅读《GRE作文范文大全(110) 》一文,出国留学网(liuxue86.com)编辑部希望本文能帮助到您。
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