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【题目】读沿某纬线我国地势剖面图,回答问题。(5分)

(1)据图可以推出我国地势的总体特征,这种地势特征对我国河流有何影响?

______________________________________________(2分)

(2)我国地势各阶梯上分布着不同的地形区。如图所示,有世界屋脊之称的是___________________,位于地势第三阶梯之上的地形区是 _______________。

(3)沟壑纵横描述的是我国__________高原的地表特征。

【答案】

(1)使大河滚滚东流,沟通了东西交通,方便了沿海和内地的联系

(2)青藏高原 华北平原

(3)黄土高原

【解析】

试题分析:

(1)我国地势的总体特征是西高东低、呈三级阶梯状分布这种地势特征有利于海洋上的湿润气流深入内陆形成降水;许多大河滚滚东流沟通了东西交通,方便了沿海和内陆的联系;阶梯交界处水能资源丰富。

(2)我国地势各级阶梯上分布着不同的地形区。第一级阶梯包括青藏高原和柴达木盆地,地形以高原为主;第二级阶梯包括塔里木盆地、准噶尔盆地、四川盆地、内蒙古高原、黄土高原、云贵高原,地形以高原、盆地为主;第三阶梯主要包括东北平原、华北平原、长江中下游平原,以及辽东丘陵、山东丘陵和江南丘陵,地形以平原和丘陵为主。据图可知:有“世界屋脊”之称的是青藏高原,位于地势第三级阶梯上的地形区是华北平原

(3)黄土高原地区由于土质疏松、降水强度大且多暴雨,再加上植被破坏严重,赤水土流失严重,对地表的冲刷力强,因此形成了“沟壑纵横”的地表特征,治理该生态问题的措施主要是植树种草

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