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【题目】某研究性学习小组在我国南方某山区进行野外考察时发现,该区域海拔大多在8001400米之间,地表起伏较大,沟谷众多,森林茂密,河水清澈。据此完成下列各题。

1

A. 风力侵蚀 B. 风力搬运、堆积

C. 流水侵蚀、搬运 D. 流水搬运、堆积

2

A. 海拔较高 B. 地表起伏较大

C. 沟谷众多 D. 森林茂密

【答案】

1

2

【解析】试题分析:

1】我国南方属于亚热带季风气候,降水丰富,河流众多,流水的侵蚀作用明显,形成呢个了侵蚀地貌;据材料可知,该地区地表起伏大,河谷众多,说明造成沟谷众多的主要外力作用是流水侵蚀、搬运作用,故C项正确。

2】河流的含沙量与植被的覆盖率有关,据材料知,该区域森林茂密,植被覆盖率高,泥沙含沙量较少,故河水清澈,D正确;海拔、地表起伏、沟谷众多等均与河流的含沙量关系不大,故排除ABC项。

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