L1：
Lecture 1
What does the professor mainly discuss?
A The health of an ecosystem in one national park
B Issues concerning the restoration of gray wolf populations
C Reasons why gray wolf populations in the United States are declining
D The importance of preserving small ecosystems
第二题
Why does the professor ask students to imagine a pyramid?
A To help them understand the different types of ecosystems
B To help them understand the differences between three types of wolves
C To help them understand the relationship between parts of an ecosystem
D To help them understand how the presence of wolves helps increase the diversity of herbivores in an ecosystem
第三题
What does the professor suggest are two less well-known benefits of the restoration of gray wolves in the United States?
Select 2 answers
A Gray wolves create food for scavengers.
B Gray wolves help increase the number of animal species found in an area.
C Gray wolves indirectly help keep vegetation levels down.
D Gray wolves help boost ecotourism.
第四题
Why does the professor mention Yellowstone National Park?
A To give an example of a site where large-scale wolf restoration has taken place
B To give an example of a site where researchers should focus more effort
C To show how money from tourism can finance species restoration
D To point out a place where wolf populations have been slowly declining
第五题
According to the professor, what would be the main purpose of reintroducing gray wolves to small ecosystems?
A To help make ecosystems healthy
B To increase the population of gray wolves in the United States
C To attract visitors to small wilderness areas
D To allow scientists to study gray wolves up close
第六题
What does the professor say about the proposal to carefully manage gray wolf populations in small areas?
A She believes it is more promising than proposals to restore wolves to large ecosystems.
B She doubts that researchers have sufficient resources to carry out such management.
C She thinks the plan should not be attempted.
D She is concerned that the public will not approve of the plan.
