单选题 Listen to Track 94.
  • A. She is certain about the correct answer.
  • B. She is now aware that her original idea had a weakness.
  • C. She is not convinced that the professor is right.
  • D. She thinks that the professor misunderstood what she said earlier.
【正确答案】 B
【答案解析】[解析]
Narrator
Listen again to part of the lecture. Then answer the question.
Professor
But how far away were they, really? How would you measure that? Any ideas? Laura?
Female student
Well, how about measuring how strong those stars shine? Because, if the star is far away, then its light would be weak, right?
Professor
Yes... but there's a problem here. You need to know how bright the star is in the first place, because some stars are naturally much brighter than others. So, if you see a star that's weak... it can mean one of two things...
Female student
Oh... it's either far away or it's just a weak star.
Narrator
What can be inferred about the student when she says this:
Female student
Oh... it's either far away or it's just a weak star.