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【题目】关于黄河各段特点的说法,不正确的是(  )

A.黄河丰富的水能资源主要集中在上中游

B.黄河是世界上含沙量最大的河流,泥沙主要来自中游

C.黄河的下游形成了“地上河”

D.治理黄河的关键是在上游修建水库

【答案】D

【解析】

本题主要考查黄河的概况、水能资源、治理。

黄河在阶梯的交界处蕴藏着巨大的水能,也就是说水能集中在上中游,所以A说法是正确的;黄河是世界上含沙量最大的河流,泥沙主要是来自于中游土质疏松、水土流失严重的黄土高原,所以B说法是正确的;黄河在中游携带了大量的泥沙,到下游河道变宽、流速减慢、泥沙沉积、日积月累形成“地上河”,所以C说法是正确的;治理黄河的关键是治沙,就是要加强黄土高原地区的水土保持,而不是在上游修建水库,所以D说法是错误的。故选D

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