306期：<<01,02,09,10,14,15,26,28,31,33,39,41,45,46,47,48>>开：31中中中
307期：<<09,15,18,20,23,25,28,32,33,37,40,42,43,45,47,48>>开：22错错错
308期：<<02,04,06,10,15,21,30,31,32,35,37,38,42,44,45,46>>开：18错错错
309期：<<01,02,04,05,08,12,13,15,18,25,27,31,34,36,39,40>>开：中？