306期:半数【《02,03,04,10,11,12,13,15,17,18,20,21,23,24,25,27,28,30,33,35,36,42,46,47》】开:17准
307期:半数【《01,02,05,07,14,15,16,18,19,20,21,24,26,27,28,34,36,37,39,43,45,46,47,48》】开:20准
308期:半数【《04,06,08,09,11,14,15,16,17,18,19,22,25,26,28,29,32,33,35,37,38,42,46,47》】开:？？？？