2. 外语
  3. An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answe

An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answe

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问题 An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
A number of processes combined to create the views that you see in today’s Grand Canyon.
[*]
                        Answer Choices
(A)Water seems to have affected the Canyon most greatly.
(B)Despite some guesses, no one knows for sure how the Grand Canyon was formed.
(C)It is hard for many people to understand the great impact of water on the Canyon given the fact that the Canyon is basically in a desert.
(D)Once the rocks removed from the edge by the ice have been taken down to the river, they fall into the Colorado River.
(E)Ice does the most erosion to the Grand Canyon after liquid water has eroded it.
(F)The Glen Canyon Dam has helped to prevent the Colorado from being eroded.
选项
答案A. Water seems to have affected the Canyon most greatly. D. Once the rocks removed from the edge by the ice have been taken down to the river, they fall into the hand of the Colorado. E. Ice does the most erosion to the Grand Canyon after liquid water has eroded it.
解析 本题为篇章总结题，考查考生理解全篇中心思想和相关重要信息的能力，考生通过区分主要观点和次要观点以及文章中没有提及的观点达到总结全篇的目的。由原文可知，形成大峡谷有多个原因：水、冰和风的侵蚀，科罗拉多河自身的条件等，所以选项A、D、E正确。
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