环境科学 TPO36-L1 Potential Energy Source Helium-3

环境科学

TPO36-L1 Potential Energy Source  Helium-3

Listen to part of a lecture in an environmental science class.

 



  1. What is the lecture mainly about?
  • A. The role of fossil fuels as an energy source in the future.
  • B. Reasons for research into alternative energy sources.
  • C. The feasibility of using a potential energy source.
  • D. Causes of probable future energy problems.

 

  1. Why does the professor mention that the Moon lacks a magnetic field?
  • A. To point out the danger inherent in mining for helium-3 on the Moon.
  • B. To point out a flaw in the theory that helium-3 can be found on the Moon’s surface.
  • C. To explain why it was difficult for astronauts to detect helium-3 on the Moon.
  • D. To explain why it is likely that there are large amounts of helium-3 on the Moon.

 

  1. According to the professor, what potential advantages does helium-3 have as an energy source?
    [CHOOSE 2 ANSWERS]
  • A. A relatively small amount of it may provide very large amounts of energy.
  • B. It is less likely to cause environmental problems than other energy sources are.
  • C. It can be used in both nuclear fusion and nuclear fission reactors
  • D. The infrastructure required for it to be used as a fuel source is not complex.

 

  1. What is the professor’s opinion of the potential of helium-3 as an energy source?
  • A. Mining helium-3 on the Moon will eventually be easy
  • B. Continuing to extract helium-3 from the Moon is not worthwhile.
  • C. Helium-3 will probably be a significant energy source within a few years.
  • D. Using helium-3 on a large scale will not be practical until nuclear fusion reactors are built.

 

  1. Why does the professor mention digging a crater to find gold?
  • A. To explain why many scientists are interested in new missions to the Moon.
  • B. To explain why helium-4 is more common on Earth than helium-3.
  • C. To explain why extracting helium-3 from lunar soil may not be practical.
  • D. To explain why scientists have looked for helium-3 in unusual places.

 

  1. What does the professor mean when he says this: 🎧
  • A. Scientists are skeptical about the likelihood of a nuclear fusion plant being built.
  • B. Scientists are aware that a nuclear fusion plant is about to be built.
  • C. Scientists have been reluctant to support the building of a nuclear fusion plant.
  • D. Scientists only started believing in the possibility of nuclear fusion in recent years.



答案:
C D AB D C A


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