2011年gre作文机经

　　考试时间：2011年1月11日

　　考试地点：成都四川大学

　　issue：103

　　"The study of history has value only to the extent that it is relevant to our daily lives."

　　issue：113

　　"It is primarily through our identification with social groups that we define ourselves."

　　argument：150

　　The following is a letter to the editor of an environmental magazine.

　　"The decline in the numbers of amphibians worldwide clearly indicates the global pollution of water and air. Two studies of amphibians in Yosemite National Park in California confirm my conclusion. In 1915 there were seven species of amphibians in the park, and there were abundant numbers of each species. However, in 1992 there were only four species of amphibians observed in the park, and the numbers of each species were drastically reduced. The decline in Yosemite has been blamed on the introduction of trout into the park's waters, which began in 1920 (trout are known to eat amphibian eggs). But the introduction of trout cannot be the real reason for the Yosemite decline because it does not explain the worldwide decline."