【题目】造成我国东、西部地区人口分布差异的自然原因,叙述正确的是( )
A.西部地区气候温暖湿润B.西部地区河流密布,水资源丰富
C.东部地区地形崎岖,以高原、山地为主D.平原、丘陵主要分布在东部地区,土壤肥沃
【答案】D
【解析】
我国已黑河——腾冲一线为界,此线以东的面积约占全国的43%,人口却为全国的94.3%,而该线西部面积约占全国的57%,人口只有全国的5.7%,我国人口分布特点是东密西疏,人口地区分布很不均匀,东西部差异大。东部地区地形平坦,气候湿润,工农商业发达,交通便利。西部地区以高原山地为主,地形崎岖,气候干旱,工农商业落后,交通不便,所以东部地区人口多,西部地区人口少。
造成我国东、西部地区人口分布差异的自然原因是我国东部地区的地形以平原、丘陵为主,地形平坦,土壤肥沃,气候温暖湿润,水资源丰富,适合人居住;我国西部地区地形崎岖,以高原、山地为主,气候较干旱,水资源短缺,不适合人居住。故选:D。
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