摘要:读某地等高线地形图.分析回答12-13题: 12.图中等高线所指的高度分别为100m.200m.300m.400m.500m.则等高线①和②的海拔高度分别为 A.100m.300m B.200m.400m C.100m.400m D.200m.300m 13.图中河流中画法正确的是 A.③ B.④ C.⑤ D.③⑤

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读某地区等高线地形图,回答下列问题:(12分)

⑴ 图中A地形区名称为           山脉,它属于          板块(2分)
⑵ 图中B河谷地主要粮食作物为         ,分析该谷地农业生产发展的条件(5分)                                                           
                                                                 
                                                                 
⑶ BC之间的河流峡谷地区降水十分丰富,试简要分析其原因。(2分)
                                                                 
                                                                 
                                                                 
                                                                 
⑷ 青藏铁路的修建对青藏地区经济发展有什么意义?(3分)
                                                                 
                                                                 
                                                                 
                                                                 
 

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