环境科学 TPO33-L2 Colorado&’s water

环境科学

TPO33-L2 Colorado’s water

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

 



  1. What is the lecture mainly about?
  • A. The use of tree rings to measure water usage rates.
  • B. Collecting data that are useful for planning water distribution.
  • C. Investigating the history of water use in the Colorado River basin.
  • D. The need for more government involvement in water distribution.

 

  1. What does the student find surprising about the 1922 water-sharing agreement?
  • A. It was based on only twenty years of data.
  • B. It was approved by all seven states in the region.
  • C. It was meant to remain in effect for more than 100 years.
  • D. It was based on data from outside the Colorado River basin.

 

  1. According to the professor, what was the problem with the data recorded before the 1970s?
  • A. The data were recorded on old instruments.
  • B. The recorded data and human observation did not match.
  • C. There were gaps in the recorded data.
  • D. The data did not reflect the historical changes in the flow of the Colorado River.

 

  1. What assumption did researchers use to draw conclusions about the Colorado River basin?
  • A. Ancient tree ring data can only be obtained from dead trees.
  • B. The climate in an area tends to remain constant over time.
  • C. Rainfall has a limited impact on water flowing in rivers.
  • D. Width of tree rings can correspond to the amount of moisture in an area.

 

  1. What does the professor imply when he describes the early to mid-1900s as the wettest period for the Colorado River in 400 years?
  • A. The climate in the Colorado River basin will become wetter in the future.
  • B. The 1922 agreement was based on overestimated average river flows.
  • C. Water flowing in the Colorado River rises and falls at a predictable rate.
  • D. Human activity caused climate change in the Colorado River basin.

 

  1. What is the professor’s attitude toward future water-management plans in the Colorado River basin?
  • A. He believes better methods for collecting data need to be developed.
  • B. He does not believe water management will be a concern in the immediate future.
  • C. He is optimistic that new data will lead to better planning.
  • D. He is not certain all scientists understand the current condition of the Colorado River.



答案:
B A D D B C


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