摘要:11.B 12 .A [解析]:本组试题考查的是有关气候变化的问题.理清图中各环节的关系是解题关键.甲导致全球变暖.所以甲为CO2大量排放.乙醇汽油的大量生产是由于石油资源的短缺.

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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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