题目内容

下图是我国某区域图,图中甲、乙、丙是重要的农业区,完成问题.

丙地区与乙地区相比,其发展农业的不利条件主要是(    )

       A.灌溉条件较差                             B.日照时间太长

       C.气温较低,热量不足                      D.土壤盐碱化严重

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下图是我国某区域图,据此回答下列问题:

(1)试描述图中东部-20℃等温线的分布特点,并分析其原因。

                                                                           

                                                                            

                                                                            

(2)简述图中A河流的水文特征。

                                                                           

                                                                            

                                                                           

                                                                            

(3)图示地区的主要农业地域类型是          ,其种植的农作物主要是                    

(4)该地区农业发展最主要的限制因素是                          

(5)简述B城所在省区发展能源工业的优势条件。

                                                                            

                                                                            

                                                                           

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