2021-11-20 来源：

托福TPO72听力Lecture1原文+题目+答案+MP3音频下载

Listen to part of the lecture in an astronomy class.

Professor: Here's an interesting word, astrobiology. Have you come across the term astrobiology before?

Male Student: It sounds like a cross between biology and astronomy. (Yes)So the study of life, Astro stars, space. So something to do with studying life in space?

Professor: Yes, precisely. It's a relatively new science on the margins for a while, but it has now reached respectability, has aspects of biology, astronomy, geology. But, maybe it's also philosophy. I mean we're dealing with the unknown, making assumptions, speculations, which some think this goes a little beyond the usual role of science. But anyway, one thing we're doing in astrobiology is that we're looking very carefully at microbes. Bacteria are one example of microbes. They are tiny organisms. You need a microscope to see them. So astrobiologists are interested in whether microbes might have been carried to earth on rocks from other planets. And studies of a meteorite found in Antarctica seem to suggest that possibility, but it's not just microbes from other planets traveling to earth that scientists are studying. Going in the other direction, they're looking at whether microbes from earth might have been carried to other planets.

Student: So could life the traveled from here exist somewhere else?

托福TPO72听力Lecture1原文余下省略！

(1)、(单选题) What is the lecture mainly about?

A.Theories regarding the existence of life on other planets

B.The transport of organisms between planets

C.Reasons that it is unlikely that life can survive in space

D.Conditions that allow microbes to grow in space

(2)、(单选题) According to the professor,which microbes are most likely to survive after Being ejected into space because of the impact of an asteroid?

A.Microbes found on the surface of rocks.

B.Microbes in the fastest-moving ejected rocks

C.Microbes with a complex cellular structure

D.Microbes inside rocks near the site of impact

托福TPO72听力Lecture1题目余下省略！

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