245期：（（01,05,07,13,14,23,24,26,28,29,36,39,40,44,46,49））开：44中中中
246期：（（05,06,10,14,15,16,17,26,28,30,36,37,38,43,46,49））开：06中中中
247期：（（01,02,06,07,15,19,24,26,28,31,35,37,38,39,40,44））开：25错错错
248期：（（04,06,09,12,14,15,17,21,24,26,28,29,31,33,39,43））开：12中中中
249期：（（03,06,08,09,16,17,28,30,32,35,36,37,38,41,48,49））开：中？