前段時間為gre考生匯總了gre issue寫作提綱思路和分析，希望對考生在攻破gre issue寫作上有所幫助。接下來的幾天我們將為gre考生整理gre argument部分的提綱內容。希望通過我們的整理和匯總，讓gre考生真正能掌握gre寫作的精髓。

題目題材：動物

　　gre argument 69題目：

　　Yellow-legged frogs were once common in high-altitude lakes in the Sierra Nevada mountains, but they have become increasingly rare. Trout feed on tadpoles and young frogs. Few lakes in the Sierra Nevada had any trout in them until a hundred years ago. At that time, many lakes were stocked with trout for recreational fishing, and now trout are common in virtually all bodies of water in the Sierra Nevada. Researchers removed the trout from one lake, and the frog population soon quadrupled. Since frogs are capable of moving several miles over land, removing trout from just a few lakes is clearly the way to restore the frog population to its former levels.

　　提綱：

　　Many other factors would also lead to the decline in frog population.

　　No direct evidence is provided to prove that it is the trout that resulted in the decline in frog population.

　　We cannot ensure that frog population in other lakes will also increase after trout were removed.

　　Removing trout from just a few lakes may not sufficiently ensure restoration of frog population to former levels.

　　The author fails to consider the cost and negative effects of removing trout from the lakes.

　　注：題目中括號里的數字表明這句話體現的是提綱中第幾號缺陷。

　　無論是gre issue還是gre argument，考生都應該養成寫提綱的習慣。這種提綱式的gre寫作練習可以幫助考生鍛煉寫作的邏輯性，而gre寫作高分最重要的得分依據就是作文的邏輯性要強。

　　前段時間為gre考生匯總了gre issue寫作提綱思路和分析，希望對考生在攻破gre issue寫作上有所幫助。接下來的幾天我們將為gre考生整理gre argument部分的提綱內容。希望通過我們的整理和匯總，讓gre考生真正能掌握gre寫作的精髓。

題目題材：動物

　　gre argument 69題目：

　　Yellow-legged frogs were once common in high-altitude lakes in the Sierra Nevada mountains, but they have become increasingly rare. Trout feed on tadpoles and young frogs. Few lakes in the Sierra Nevada had any trout in them until a hundred years ago. At that time, many lakes were stocked with trout for recreational fishing, and now trout are common in virtually all bodies of water in the Sierra Nevada. Researchers removed the trout from one lake, and the frog population soon quadrupled. Since frogs are capable of moving several miles over land, removing trout from just a few lakes is clearly the way to restore the frog population to its former levels.

　　提綱：

　　Many other factors would also lead to the decline in frog population.

　　No direct evidence is provided to prove that it is the trout that resulted in the decline in frog population.

　　We cannot ensure that frog population in other lakes will also increase after trout were removed.

　　Removing trout from just a few lakes may not sufficiently ensure restoration of frog population to former levels.

　　The author fails to consider the cost and negative effects of removing trout from the lakes.

　　注：題目中括號里的數字表明這句話體現的是提綱中第幾號缺陷。

　　無論是gre issue還是gre argument，考生都應該養成寫提綱的習慣。這種提綱式的gre寫作練習可以幫助考生鍛煉寫作的邏輯性，而gre寫作高分最重要的得分依據就是作文的邏輯性要強。