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托福阅读修辞目的题解析：Volcanic Islands

2017-09-30 10:50:54来源：网络

　　为了帮助考生更好的备考托福阅读考试，在考试中能有更加理想的发挥。下面新东方在线托福网为大家带来托福阅读修辞目的题解析：Volcanic Islands一文，更多精彩尽请关注新东方在线托福网!

　　【Paragraph 1】Earth’s surface is not made up of a single sheet of rock that forms a crust but rather a number of　“tectonic plates” that fit closely, like the pieces of a gain jigsaw puzzle. Some plates carry islands or continents, others　form the seafloor. All are slowly moving because the plates float on a denser sem-iliquid mantle, the layer between the　crust and Earth’s core. The plates have edges that are spreading ridges (where two plates are moving apart and new　seafloor is being create○, subduction zones (where two plates collide and one plunges beneath the other), or transform　faults (where two plates neither converge nor diverge but merely move past one another). It is at the boundaries between　plates that most of Earth’s volcanism and earthquake activity occur.(The Formation of Volcanic Islands)

　　The author mentions “spreading ridges”, “subduction zones”, and “transform faults” in order to

　　A. illustrate that the boundaries of tectonic plates are neat, thin lines

　　B. explain why some tectonic plates carry islands or continents while others form the seafloor

　　C. explain the complex nature of the edges of tectonic plates

　　D.provide examples of areas of tectonic plates where little geologic action occurs

　　托福阅读修辞目的题答案：C

　　以上就是新东方在线托福网为你带来的托福阅读修辞目的题解析：Volcanic Islands，更多精彩敬请关注新东方在线托福网。

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