单项选择题

According to the article, strict wildlife protection laws and improved wildlife management techniques ______.

A．caused the near extinction of the endangered animals
B．intervened the natural process
C．made the visit of National Parks relaxing, and inspiring and rejuvenating
D．saved the elks in the Rocky Mountain Park from starvation

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热门试题

单项选择题

The author's main criticism of John Lott is that he ______.

A．advocates private ownership of firearms
B．is not objective in his analysis
C．has analyzed a wrong period
D．has cited dubious statistics

单项选择题

According to the article, a population explosion of elk and deer was caused also by ______.

A．the adoption of a policy of aggressive predator elimination
B．the increased number of Nation Parks
C．the decreasing number of visitors to National Parks
D．the heavy exploitation of endangered animals in the 20 century