托福TPO70听力Lecture3原文+题目+答案+MP3音频下载

托福TPO70听力Lecture3原文+题目+答案+MP3音频下载

以下为托福TPO70听力Lecture3原文：

Listen to part of a lecture in an astronomy class.

P：Ok,Moving on. Let me ask an open question. Have any of you ever seen an aurora maybe youve heard it called by its other name the northern lights. Keren

K： Yeah, when I was little ,its the lights in the sky, right? I was in Alaska on vacation

P：ok good. Its in the very high latitudes, places like Alaska which is near the North Pole of earth or areas near the South Pole where you'd be able to see an aurora best.So What did you think?

K：I don't remember that ,1 think it was like just this big stripe of light in the sky ,sort of like a big greenish band type thing.

P： The band has sort of like this.

K：Yeah, I think so.

P：Great. It looks like a band or a curtain. And the greenest color is quite common. But you see other shapes and colors too, for example, arcs or a red color. And you'd be able to see them when the sky is clear and dark and like I said, you need to be in higher latitudes

M： I have to say this is the first i've ever heard of something like this. Is it caused by like light pollution like too much light shining up from some human source or something.

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托福TPO70听力Lecture3题目：

(1)、(单选题) What is the purpose of the lecture'?

A.To explain the importance of Earth s magnetic field

B.To explain how solar wind affects Earth’s surface

C.To discuss how the composition of the atmosphere changes near the poles

D.To outline the process that results in a type of atmospheric tight

(2)、(单选题) What does the professor say about the appearance of auroras?

A.Auroras appear in several forms and colors

B.Auroras appear red in areas close to the poles

C.Weather conditions affect the size of auroras

D.The arc form is typical of Alaskan auroras

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