托福tpo2阅读文本翻译及解析整理(完整版).docx

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1、智课网TOEFL备考资料托福tpo2阅读文本翻译及解析整理(完整版) 摘要： 托福tpo2阅读文本翻译及解析整理(完整版)!托福TPO内容是同学们备考时必不可少的，但是很多学生的TPO内容都不是很全，一些同学最近不断问小编要托福tpo2阅读文本翻译及解析内容，今天就索性将这些内容给整理出来同学们可以一键打包下载。 托福 阅读在托福四大项中还是比较容易得分的一项，因此同学们想得高分就要熟悉阅读常考题目及设置的题型，这些就离不开对真题的了解，TPO内容全部来自历年真题，这里特给出了托福tpo2阅读文本翻译及解析整理(完整版)资料，同学们有需要的快来获取吧! 扫码立即获取托福tpo2阅读文本翻译及解

2、析整理(完整版)资料： 托福tpo2阅读文本翻译及解析具体内容如下： PO2-1-1 原文：The Origins Of Cetaceans It should be obvious that cetaceans-whales, porpoises, and dolphins-are mammals. They breathe through lungs, not through gills, and give birth to live young. Their streamlined bodies, the absence of hind legs, and the presence of

3、 a fluke1 and blowhole2 cannot disguise their affinities with land dwelling mammals. However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses, whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like. Extinct but a

4、lready fully marine cetaceans are known from the fossil record. How was the gap between a walking mammal and a swimming whale bridged? Missing until recently were fossils clearly intermediate, or transitional, between land mammals and cetaceans. Very exciting discoveries have finally allowed scienti

5、sts to reconstruct the most likely origins of cetaceans. In 1979, a team looking for fossils in northern Pakistan found what proved to be the oldest fossil whale. The fossil was officially named Pakicetus in honor of the country where the discovery was made. Pakicetus was found embedded in rocks for

6、med from river deposits that were 52 million years old. The river that formed these deposits was actually not far from an ancient ocean known as the Tethys Sea. The fossil consists of a complete skull of an archaeocyte, an extinct group of ancestors of modern cetaceans. Although limited to a skull,

7、the Pakicetus fossil provides precious details on the origins of cetaceans. The skull is cetacean-like but its jawbones lack the enlarged space that is filled with fat or oil and used for receiving underwater sound in modern whales. Pakicetus probably detected sound through the ear opening as in lan

8、d mammals. The skull also lacks a blowhole, another cetacean adaptation for diving. Other features, however, show experts that Pakicetus is a transitional form between a group of extinct flesh-eating mammals, the mesonychids, and cetaceans. It has been suggested that Pakicetus fed on fish in shallow

9、 water and was not yet adapted for life in the open ocean. It probably bred and gave birth on land. Another major discovery was made in Egypt in 1989. Several skeletons of another early whale, Basilosaurus, were found in sediments left by the Tethys Sea and now exposed in the Sahara desert. This wha

10、le lived around 40 million years ago, 12 million years after Pakicetus. Many incomplete skeletons were found but they included, for the first time in an archaeocyte, a complete hind leg that features a foot with three tiny toes. Such legs would have been far too small to have supported the 50-foot-l

11、ong Basilosaurus on land. Basilosaurus was undoubtedly a fully marine whale with possibly nonfunctional, or vestigial, hind legs. 1. In paragraph 1, what does the author say about the presence of a blowhole in cetaceans? It clearly indicates that cetaceans are mammals. It cannot conceal the fact tha

12、t cetaceans are mammals. It is the main difference between cetaceans and land-dwelling mammals. It cannot yield clues about the origins of cetaceans. 2. Which of the following can be inferred from paragraph 1 about early sea otters? It is not difficult to imagine what they looked like There were gre

13、at numbers of them. They lived in the sea only. They did not leave many fossil remains. 参考答案 1、2 2、1 3、3 4、3 5、1 6、2 7、4 8、4 9、2 10. 3 11. 4 12. 2 13. 1 2 5 答案解析： 第一题，B，细节题。在第一段，关于鲸类动物的喷水孔的出现，作者说了什么?细节题，通过blowhole定位到第三句，这里说喷水孔的存在不能掩饰它们与陆生哺乳动物的affinities密切联系，到选项中找一下，只有B说它不能掩饰鲸类是哺乳动物的事实，conceal对应disguise，本题选B。A它清楚的表明鲸类是哺乳动物，clearly indicates和不能掩饰是不同的概念;C它是鲸类与陆生哺乳动物的主要不同，blowhole只是一个小小的区别，不是main difference;D 它不能提示鲸类起源，与定位句无关。 以上是小编对托福tpo2阅读文本翻译及解析整理(完整版)的详细介绍，由于托福TPO2阅读中有三篇文章篇幅比较长页面有限，小编已经完整内容打包，同学们可向 小马 老师一键索取。 相关字搜索： 托福tpo2阅读文本翻译及解析