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There is mounting evidence that the frequency and magnitude of landsliding is changing in many parts of the world in response to
There is mounting evidence that the frequency and magnitude of landsliding is changing in many parts of the world in response to
admin
2021-03-28
40
问题
There is mounting evidence that the frequency and magnitude of landsliding is changing in many parts of the world in response to climate change. This is not surprising, given that precipitation is one of the two external triggering mechanisms—the other being seismic activity—involved in the formation of landslides.
Evidence from the past
clearly indicates that cycles of elevated landslide activity have been followed by cycles of low activity, and that these are correlated with climate fluctuations over a variety of timescales.
What sets current changes in landslide activity apart is the likely influence of anthropogenic [i.e., human-caused] factors, either acting alone or in concert with climate, which can further modify the process of landsliding and the nature of ecosystem responses. Among these factors, deforestation and land-use change have the potential to influence the frequency and magnitude of landsliding because of their direct effects on vegetation attributes that influence slope stability. The extent and conditions under which mountain ecosystems are resilient to thes changes—that is, the amount of disturbance they can absorb before changing into states with different structure and function—are not known. Addressing this issue is crucial for the long-term conservation of mountainscapes.
The author of the passage cites “evidence from the past” in order to
选项
A、support a partial explanation
B、concede a potential objection
C、dismiss an apparent counterexample
D、highlight a scientific consensus
E、account for a historical anomaly
答案
A
解析
本题属于功能题,定位句3s版本是气候影响山体滑坡。同时根据文章可知,气候并非是影响山体滑坡的唯一因素,还有地震和人为因素,因此只是一个partial explanation,因此选项A正确。
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本试题收录于:
GRE VERBAL题库GRE分类
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GRE VERBAL
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