托福TPO 6 听力Lecture第4篇第3题_In the lecture, what do the Ice Age and the creation of the Sahara Desert both illustrate about past climate changes?

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题目

In the lecture, what do the Ice Age and the creation of the Sahara Desert both illustrate about past climate changes?

that some climate changes benefited the development of civilization

that some climate changes were not caused by human activity

that some climate change were caused by a decrease of moisture in the atmosphere

that some climate changes were caused by changes in Earth’s motion and position

题目解析

根据教授所说内容： Okay, a monsoon is a seasonal wind that can bring in a large amount of rainfall. Now if the monsoon migrates, well, that means that the rains move to another area, right? So what caused the monsoon to migrate? Well, the answer is: the dynamics of earth’s motions, the same thing that caused the Ice Age by the way. 季风是季节性的刮风，能带来大量雨水，如果季风迁移，那么雨水也会随之迁移。那么是什么造成季风迁移，那就是地球的运动。同样，正是因为这个原因，才出现了冰河世纪。所以冰河世纪和撒哈拉沙漠的形成都是因为地球的运动和位置造成的。选项 D 正确。

答案: D

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