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托福阅读句子插入题：The surface of Mars

2015-08-24 16:32:14来源：网络

　　【托福阅读题型：The surface of Mars句子插入题】托福阅读中句子插入题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

　　查看全部：托福阅读题型分类练习之句子插入题

　　托福阅读句子插入题：The surface of Mars

　　The detailed appearance of Martian impact craters provides an important piece of information about conditions just　below the planet’s surface. Martian craters are surrounded by ejecta (debris formed as a result of an impact) that looks　　quite different from its lunar counterparts. A comparison of the Copernicus crater on the Moon with the (fairly typical)　　crater Yuty on Mars demonstrates the differences. The ejecta surrounding the lunar crater is just what one would expect　　from an explosion ejecting a large volume of dust, soil, and boulders. ■However, the ejecta on Mars gives the distinct　　impression of a liquid that has splashed or flowed out of crater. ■Geologists think that this fluidized ejecta crater indicates　　that a layer of permafrost, or water ice, lies just a few meters under the surface. ■Explosive impacts heated and liquefied　the ice, resulting in the fluid appearance of the ejecta. ■(The surface of Mars)

　　Look at the four squares【■】that indicate where the following sentence could be added to the passage.

　　This surface feature has led to speculation about what may lie under Mars’s surface.

　　Where would the sentence best fit? Click on a square to add the sentence to the passage.

　　答案见下一页：

本文关键字: 托福阅读题型 托福阅读训练 句子插入题

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