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There is mounting evidence that the frequency and magnitude of landsliding i
There is mounting evidence that the frequency and magnitude of landsliding i
游客
2024-01-10
4
管理
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. [br] The passage makes which of the following claims?
选项
A、A rise in precipitation resulting from human factors has increased the frequency and magnitude of landsliding.
B、Human factors have led to greater changes in landsliding activity than have cyclical climate fluctuations.
C、Decreases in landsliding activity have historically been accompanied by changes in climate.
D、Slope stability is more influenced by seismic activity than it is by human factors
E、Changes in land-use patterns in mountain ecosystems are generally correlated with changes in climate.
答案
C
解析
对应第一段最后一句,其中historically对应原文中的Evidence from the past。
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