（1）京九铁路位于                 铁路和                铁路两大铁路干线之间。该线与长江的交点是                
    （城市），此城市附近有湖                （名称）。该线与陇海铁路线交点是                  （城市），该
    城市位于                 省（名称）。

（2）京九铁路建设的主要区位因素有：
    ①　　　　　　　                                                                                                                        　 。
    ②　　　　　 　　                                                                                                                        　。
    ③　　　　　 　　　                                                                                                                        。
    ④　　　 　　　　　　　　　　　　                                                                                            　。

（3）图中A和B两地分别建有我国两个大型钢铁企业，影响两地该工业布局的最主要区位因素分别为：
    A____________________________                                                                                                      ；
    B___________________________                                                                                                        。

（4）C城市兴起的最主要区位因素是_______________                                                                          。

（5）图中甲、乙两个阴影所在地区商业网点的显著差异是：
    甲                                                                                                                                                     ，
    乙                                                                                                                                                     ，
    原因是 __________________________________________________                                                        
                                                                                                                                                                
                                                                                                                                                             。