有关A、B两河段的叙述。错误的是                       

有关AB两河段的叙述。错误的是                          

AA河段主要表现为侵蚀作用           BB河段主要表现为沉积作用

CA河段河谷多为“U”形谷            DB河段河谷比较宽阔

答案

C

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