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【题目】要治理黄河的泥沙,关键是(

A.上游修水库 B.中游水土保持 C.中游垦荒种粮 D.下游修筑大堤

【答案】B

【解析】

试题分析:黄河是我国第二长河,也是世界著名大河之一,它源自巴颜喀拉山,流经青海、四川等9省区,注入渤海,全长5464千米.黄河中游流经黄土高原,由于水土流失严重,河流泥沙大增,下游流经华北平原,河床宽坦,水流缓慢,泥沙大量淤积,使河床抬高,成为举世闻名的地上河.

解:黄河中游流经黄土高原,由于水土流失严重,河流泥沙大增,治理黄河的关键是治理中游泥沙即黄土高原的水土保持.

故选:B.

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