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【题目】黄河中下游含沙量大的重要原因是

A注入的支流众多 B降水量大,位于湿润区

C水流速快 D流经黄土高原区

【答案】D

【解析】

试题分析:黄河的中游流经了土质疏松的黄土高原,这里植被遭到破坏,地表得不到保护,在夏季多暴雨的情况下,出现严重的水土流失现象,大量的泥沙被携带,使黄河成为世界上含沙量最大的河流

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