4． 读“南方图”图回答（6分）

                                                （1）写出图中字母代表的地理事物

                                                    A                山脉

                                                B                山脉

                                                C                半岛                                

                                                D                港口                                

                                                E                特区                              

                                                F                核电站                                

                                                G                旅游胜地                                

                                                H                旅游城市                               

                                                I                矿产产地                                 

J                河流 

（3）     简答东南沿海发展外向型工业的有利条件：