【題目】要治理黃河的泥沙，關(guān)鍵是（ ）

A．上游修水庫(kù) B．中游水土保持 C．中游墾荒種糧 D．下游修筑大堤

【答案】B

【解析】

試題分析：黃河是我國(guó)第二長(zhǎng)河，也是世界著名大河之一，它源自巴顏喀拉山，流經(jīng)青海、四川等9省區(qū)，注入渤海，全長(zhǎng)5464千米．黃河中游流經(jīng)黃土高原，由于水土流失嚴(yán)重，河流泥沙大增，下游流經(jīng)華北平原，河床寬坦，水流緩慢，泥沙大量淤積，使河床抬高，成為舉世聞名的地上河．

解：黃河中游流經(jīng)黃土高原，由于水土流失嚴(yán)重，河流泥沙大增，治理黃河的關(guān)鍵是治理中游泥沙即黃土高原的水土保持．

故選：B．

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