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【题目】读下图流经黄土高原的黄河景观图回答下列问题。

【1】图中大量泥沙汇入黄河,其主要自然原因

黄土疏松 河流落差小

植被覆盖好 夏季多暴雨

A①② B.①④

C.②③ D.③④

【2】黄土高原面临的主要环境问题是

A.气候变暖 B.旱涝灾害

C.水土流失 D.土地荒漠化

【3】黄土高原综合治理和保护环境的正确措施是

植树种草 打坝淤地 开垦荒地 发展水田

A①② B①③ C②④ D③④

【答案】

【1】B

【2】C

【3】A

【解析】

试题分析:

【1】读图可知,图中大量泥沙汇入黄河,是由于黄土高原水土流失造成的。导致水土流失严重的主要自然原因是黄土高原土质疏松,植被稀少,夏季暴雨多等。故选B。

【2】黄土高原地处我国东部季风区向西北内陆干旱区过渡带、森林向草原的过渡带等多重过渡地区,生态环境脆弱,黄土疏松,地表植被覆盖率低,降水变率大且集中,加之人类不合理经济活动,导致严重水土流失,故选C。

【3】黄土高原综合治理主要在于防治水土流失。可以采取植树种草方式,提高植被覆盖率,打坝淤地等工程措施,①②对。而开垦荒地,会加剧水土流失,发展水田不符合区域经济发展的因地制宜原则,③④错。故选A。

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