托福阅读修辞目的题是阅读考试中比较常见的一种题型，tpo则是托福阅读备考最权威的材料 ，所以托福小编综合二者，为大家集中整理了tpo阅读中考察的修辞目的题及其对应的解析，供大家参考使用。本文带来的是TPO9-1的修辞目的题，一起来看看吧。
TPO9-1 Colonizing the Americas via the Northwest Coast
Paragraph 2:
Support is growing for the alternative theory that people using watercraft, possibly skin boats, moved southward from Beringia along the Gulf of Alaska and then southward along the Northwest Coast of North America possibly as early as 16,000 years ago. This route would have enabled humans to enter southern areas of the Americans prior to the melting of the continental glaciers. Until the early 1970s, most archaeologists did not consider the coast a possible migration route into the Americans because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by glacial ice. It had been assumed that the ice extended westward from the Alaskan/Canadian mountains to the very edge of the continental shelf, the flat, submerged part of the continent that extend into the ocean. This would have created a barrier of ice extending from the Alaska Peninsula, through the Gulf of Alaska and southward along the Northwest Coast of North America to what is today the state of Washington.
3. Paragraph 2 begins by presenting a theory and then goes on to
○discuss why the theory was rapidly accepted but then rejected
○present the evidence on which the theory was based
○cite evidence that now shows that the theory is incorrect
○explain why the theory was not initially considered plausible
解析：问题问先提出理论接着怎么了，所以看第二句。说这个路线能让人们在冰川融化之前进入美洲南部，所以这个是支持本段第一句内容的，而且后一句说直到70年代，人们才认同coast路线，也就是这个理论可能是对的。A和C都不对，原文没说前面的理论是基于这个事实的，B错，D正确
[2]另外一种理论得到越来越多的人的支持，它认为可能早在16 000年前，人们使用船只，也许是那种兽皮做的小船，从白令沿着阿拉斯加海湾，然后沿着北美的西北海岸前进。这条路线使人类可以在大陆冰河解冻之前进入美洲南部地区。直到20世纪70年代早期，大部分考古学家都不认为海岸可能是进入美洲的移民路线，因为地理学家一开始就坚信整个西北海岸在上个冰河时代是被冰川覆盖的。人们猜测冰从阿拉斯加、加拿大山脉向西延伸到大陆架的边界，也就是大陆延伸到海洋中而被淹没的部分。这样就形成了一个由冰构成的，从阿拉斯加半岛，经过阿拉斯加海湾，向南沿着北美洲西北海岸延伸至今天的华盛顿州的冰层障碍。
Paragraph 4:
More recent geologic studies documented deglaciation and the existence of ice-free areas throughout major coastal areas of British Columbia, Canada, by 13,000 years ago. Research now indicates that sizable areas of southeastern Alaska along the inner continental shelf were not covered by ice toward the end of the last Ice Age. One study suggests that except for a 250-mile coastal area between southwestern British Columbia and Washington State, the Northwest Coast of North America was largely free of ice by approximately 16,000 years ago. Vast areas along the coast may have been deglaciated beginning around 16,000 years ago, possibly providing a coastal corridor for the movement of plants, animals, and humans sometime between 13,000 and 14,000 years ago.
7. The author's purpose in paragraph 4 is to
○indicate that a number of recent geologic studies seem to provide support for the coastal hypothesis
○indicate that coastal and inland migrations may have happened simultaneously
○explain why humans may have reached America's northwest coast before animals and plants did
○show that the coastal hypothesis may explain how people first reached Alaska but it cannot explain how people reached areas like modern British Columbia and Washington State
解析：问整段的目的，所以看第一句。研究表明那时候加拿大海岸没有冰，所以是支持由海路到达美洲的hypothesis，A或者D可能对，但D后半句的but没说，所以A正确。不放心的话往后再看看，第二句又是一个research indicate blabla，所以A的a number of studies正确
[4]更多最近的地质研究证明了13 000年前在加拿大的不列颠可伦比亚省主要海岸地区无冰区域的存在和结冰。现在研究表明，直到上个冰河时代末期，阿拉斯加东南、沿大陆架内的大部分地区并没有被冰层覆盖。一项研究表明，除了在不列颠哥伦比亚省东南部和华盛顿州之间的250英里的海岸地区以外，北美的西北海岸在大概16 000年之前都是没有冰的。沿海的辽阔地区的冰川在大约16 000年前开始融化，这就为13 000前 到14 000年前的某一段时间内植物、动物和人类的迁移提供了一个海岸走廊。
以上就是托福阅读TPO9-1中的修辞目的题及其解析，大家可以在备考的时候参考复习，希望能够帮助大家的考前准备。最后前程百利祝大家都能取得理想的托福考试成绩。
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