天文学 TPO19-L2 Difficulties in Astronomy

TPO19-L2

Difficulties in Astronomy

Listen to part of a lecture in an astronomy class.

 



  1. What is the lecture mainly about?
  • A. Recent advances in technology used by astronomers.
  • B. How radio astronomy has led to advances in communication technology.
  • C. Important discoveries made by radio astronomers.
  • D. Difficulties astronomers have in observing the universe.

 

  1. What is the professor’s attitude about light pollution in cities?
  • A. He feels that it should be carefully regulated.
  • B. He believes it is unfortunate.
  • C. He thinks astronomers have not done enough to address the issue.
  • D. He believes that the severity of the problem is often exaggerated.

 

  1. According to the professor, why are radio waves particularly useful for astronomical observations?
    [CHOOSE 2 ANSWERS]
  • A. Some astronomical bodies emit radio waves but not visible light.
  • B. Radio waves provide more information about star composition than visible light waves do.
  • C. Radio waves can be detected with simple equipment.
  • D. Radio waves can pass through particles in space.

 

  1. What does the professor imply is an advantage of optical astronomy over radio astronomy?
  • A. It allows for more precise observations.
  • B. It is better for making observations within our own galaxy.
  • C. It requires less sophisticated equipment.
  • D. It is not affected by the weather.

 

  1. According to the professor, why do radio astronomers sometimes have difficulty studying very distant objects?
    [CHOOSE 2 ANSWERS]
  • A. Signals from closer objects interfere with radio waves from space.
  • B. Particles in the atmosphere change the direction of radio waves.
  • C. Radio waves from space are not very strong.
  • D. Light waves from sources on Earth alter radio waves from distant objects.

 

  1. What does the professor mean when he says this: 🎧

 

  • A. He wants to emphasize the progress that has been made in radio astronomy.
  • B. He thinks radio astronomy and optical astronomy both provide valuable information.
  • C. He does not want to spend time discussing the technology of radio telescopes.
  • D. He would like the students to give examples of discoveries made with radio telescopes.


答案:
D B AD C AC C

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