020期:01,02,05,07,08,09,10,11,13,17,18,20,21,22,23,25,28,29,30,32,33,35,37,38,40,41,42,45,47,49,    开35中
021期:01,03,04,07,08,09,11,13,16,17,19,20,21,23,24,27,28,29,31,33,36,37,39,40,41,43,44,47,48,49,