A-A+
Why does a rock avalanche move faster than oth
问题详情
Why does a rock avalanche move faster than other types of rockslides？
A．The rock moves over a layer of compressed air.
B．The rainfall is heavy where avalanches occur.
C．The rock breaks apart as it moves downslope.
D．The angle of the slope is almost vertical.请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：A rock avalanche moves faster than other types of rockslides because the rock moves over a layer of compressed air. Clues: The fastest type of slide is a rock avalanche, in which a mass of rock literally floats on air as it moves downslope. The high speed of a rock avalanche is the result of air becoming trapped and compressed beneath the falling mass of debris....(1.1)
