310期：<<02,05,06,09,10,19,23,25,36,38,39,42,43,44,45,48>>开：19中中中
311期：<<03,06,08,12,14,18,30,31,32,33,35,37,38,40,41,49>>开：47错错错
312期：<<03,08,10,13,14,17,20,21,24,28,32,42,43,45,46,48>>开：47错错错
313期：<<01,04,05,07,11,17,18,23,24,32,33,35,36,42,45,46>>开：中？