地质学 TPO54-L4 New Evidence of River Hypothesis

地质学

TPO54-L4 New Evidence of River Hypothesis

Listen to part of a lecture in a geology class.

 



  1. What does the professor mainly discuss?
  • A. A hypothesis that rivers formed before the rise of plant life
  • B. A study of the effects that rivers have on soil formation
  • C. A debate surrounding two opposing hypotheses
  • D. New evidence in support of a previously proposed hypothesis

 

  1. What limitation of Cotter’s research does the professor mention?
  • A. Cotter’s research findings could not be replicated.
  • B. Cotter’s research was based on one geographical area.
  • C. Cotter’s research did not take into account lateral accretion.
  • D. Cotter’s research did not account for changes in climate.

 

  1. What did researchers try to confirm about rivers in a recent study?
  • A. That rivers now have the same shape worldwide
  • B. That rivers were responsible for the spread of plant life
  • C. That a change in the shape of rivers is linked to the spread of plant life
  • D. That most rivers emerged during a specific geological time period

 

  1. Why does the professor describe the composition of the sediment of the earliest rivers?
  • A. To identify the evidence used to determine how the rivers flowed
  • B. To explain why the rivers could easily dry out
  • C. To suggest that the sediment was once fine sand
  • D. To suggest that the geological record might be flawed

 

  1. According to the professor, what is an effect of lateral accretion on a meandering river?
  • A. Bends in the river become gradually straighter.
  • B. Material from one riverbank is deposited on the other.
  • C. The intensity of the river’s flow increases.
  • D. The growth of plants on the outer riverbank is enhanced.

 

  1. Why does the professor say this: 🎧

 

  • A. To find out what the students know about Mars
  • B. To question certain geological studies of other planets
  • C. To express a reservation he has about the hypothesis
  • D. To indicate that he is going to change the topic



答案:
D B C A B C


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