根据网考网考试中心的统计分析，以下试题在2018/7/26日托福考试习题练习中，答错率较高，为：54%
【单选题】 According to the passage, rock breaks down into clay under all of the following conditions EXCEPT when
A．(it is exposed to freezing and thawing
B．( roots of trees force their way into cracks
C．( it is combined with alkalies
D．( natural forces wear away the Earth's crust
网考网参考答案：C，答错率：54%
网考网试题解析：
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