托福阅读总结题主要考查学生理解和识别主要内容和文中所提及重要的信息。有六个选项，你可以从中选出三个最能表达主要思想的句子。这类考题分值是2分，选出三个得2分，选出2 个得1分，顺序选择不影响得分。那么，在以下内容中我们就为大家带来一些相关的范例，希望能为大家的备考带来帮助。
例题4：TIMBERLINE VEGETATION ON MOUNTAINS
At the timberline, whether upper or lower, there is a profound change in the growth of trees and other plants.
Answer choices
1. Birch is one of the few species of tree that can survive in the extreme environments of the upper timberline.
2. There is no agreement among scientists as to exactly why plant growth is sharply different above and below the upper timberline.
3. The temperature at the upper timberline is probably more important in preventing tree growth than factors such as the amount of snowfall or the force of winds.
4. The geographical location of an upper timberline has an impact on both the types of trees found there and their physical characteristics.
5. High levels of ultraviolet light most likely play a greater role in determining tree growth at the upper timberline than do grazing animals such as the ibex.
6. Despite being adjacent to the timberline, the alpine tundra is an area where certain kinds of low trees can endure high winds and very low temperatures.
托福阅读总结题练习题答案：2、4、6
