310期:半数【《01,02,03,04,05,09,11,14,16,17,20,23,24,25,27,28,31,35,37,39,41,43,44,46》】开:16准
311期:半数【《01,03,04,07,08,09,10,12,13,15,18,19,21,22,28,29,32,33,34,35,36,43,45,48》】开:37错
312期:半数【《01,02,06,07,08,11,12,13,15,16,18,20,22,28,30,31,32,33,35,36,40,41,46,47》】开:14错
313期:半数【《01,02,04,05,07,11,12,13,15,16,17,19,22,23,24,25,29,38,40,43,44,46,48,49》】开:38准
314期:半数【《01,03,04,06,10,11,12,14,16,20,22,26,28,29,31,32,34,36,38,39,41,45,46,47》】开:？？？？