275期：（（01,04,15,16,17,20,23,24,31,35,37,42,43,44,45,46））开：45中中中
276期：（（02,04,09,11,13,14,22,26,31,32,34,39,43,45,46,47））开：09中中中
277期：（（07,08,10,12,14,19,21,22,32,36,37,38,42,43,47,49））开：16错错错
278期：（（01,07,11,15,18,19,20,23,30,31,34,35,38,39,44,47））开：28错错错
279期：（（02,03,04,05,06,14,15,16,21,24,25,37,41,45,46,48））开：中？