【小站原创】官方真题Official49托福听力Lecture真题文本及答案解析
- 2017年04月01日16:28 来源:小站教育作者:小站托福编辑
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在托福听力备考中,想要快速提升自己的托福听力能力,选择好适合的练习材料是个非常重要的环节。而对于很多备考学生来说,官方真题Official为往往就是一个备考材料的首先。那么,在以下内容中,我们就为大家带来托福官方真题Official49听力Lecture题目文本及答案解析。

Lecture1 (Alaska)
What is the main purpose of the lecture?
A.To contrast how different kinds of thaw lakes grow
B.To explain why a new theory of thaw lakes is gaining acceptance
C.To explain how processes in permafrost lead to the formation of thaw lakes
D.To describe two competing theories about the growth of thaw lakes
答案:CD
解析:
C:What we call the active layer of permafrost,which melts in the summer and refreezes again in the winter.
D:There's been considerable research done to try to figure out what causes them to be shaped and oriented this way. What makes them grow this way?
从这些内容来看,整个Lecture都在围绕着融湖是如何形成的。并且文章中提出了两个不同的理论来论证。第一个理论将“分”作为融湖朝向的起因,而第二理论则认为是坍塌造成的。
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