托福听力背景材料之地理冒险

　　在托福听力考试中，涉及到的话题比较多，因此有关这方面的材料也层出不穷，接下来小编要和大家分享的是托福听力背景材料之地理冒险，同学们可以在考试前进行参考，如果在考试中遇到有关这方面的材料，那你就幸运了哦。

　　先给同学们说下地理变化形式之撒哈拉沙漠气候变化时间表：

　　22000-10500年前，撒哈拉在尼罗河之外没有人烟，较现今的位置往南延伸250英里。

　　10500-9000年前，季风雨开始普降撒哈拉，使得这一地区变成可居住的地方，尼罗河流域的居民到此定居。

　　9000-7300年前，持续的雨水让这里的植物生长茂盛，加上动物的迁移导致人类来此定居，还包括本地家畜的引进，如绵羊和山羊。

　　7300-5500年前，没有季风雨的日子让埃及撒哈拉开始变得干旱，是人类向还可以居住的苏丹撒哈拉迁移。

　　5500年后，雨水的结束和干旱的到来使撒哈拉人口重返尼罗河流域，法老社会开始。

　　Glacier Movement(TPO7 Lecture4)

　　接下来再给同学们看下范文：

　　Good morning, class. Before we begin today, I would like to address an issue that one of you reminded me of after the last lecture. As you may recall, last time I mentioned that Robert E. Peary was the first person to reach the North Pole. What I neglected to mention was the controversy around Peary’s pioneering accomplishment. In 1910, a committee of the national geographical society examined Commodore Peary’s claim to have reached the North Pole on April 6th’ 1909 and found no reason to doubt him. This judgment was actually confirmed by a committee of the US congress in 1911. Nevertheless, Peary’s claim was surrounded by controversy. Tins was largely due to the competing claim of Doctor Frederic Cook who told the world he had reached the Pole a four-year earlier. Over the decades Peary was given the benefit of the doubt, but critics persisted in raising questions about his navigation and the distances he claimed to have covered. So the Navigation Foundation spent an additional 12 months of exhaustive examination of documents relating to Peary’s polar expedition. The documents supposed Peary’s claims about the distances he covered. After also conducting an extensive computer analysis of photos taken by Peary at the pole, they concluded that Pierre and his companions did in fact reach the near vicinity of the North Pole on April 6th. 1909. OK, today we’re going to talk about exploration of the opposite end of the world, I assume you all read chapter 3 in our text and are now familiar with the names: Emerson and Scott.

　　以上就是有关“托福听力背景材料之地理冒险”的全部内容了，有关地理方面的素材其实还有很多，同学们在训练的时候可以分类整理下来，或者直接向咱们聚培训在线客服直接索要就可以了，最后祝同学们考试成功。