读“我国东部沿海的地区图”,回答:
(1)写出图中字母代表的我国最大海洋渔场和当前重点开发区的名称: 
    A:________渔场;B:________重点开发区;C:________重点开发区;D:________重点开发区。
(2)图中A处形成我国最大海洋渔场的原因___________                                                        ________                                                 _。
(3)比较B、C两重点开发区发展钢铁工业的优势和不利因素。
                                                                                                                                                               
                                                                                                                                                               
(4)结合D重点开发区的气候、草场和海洋等方面的资源优势,确定当前及今后开发重点,应在本区建成哪些农业生产基地?
                                                                                                                                                               
 0  11243  11251  11257  11261  11267  11269  11273  11279  11281  11287  11293  11297  11299  11303  11309  11311  11317  11321  11323  11327  11329  11333  11335  11337  11338  11339  11341  11342  11343  11345  11347  11351  11353  11357  11359  11363  11369  11371  11377  11381  11383  11387  11393  11399  11401  11407  11411  11413  11419  11423  11429  11437  133493