017期：≌【24】≌《01,04,07,10,11,16,17,18,19,20,24,25,27,31,33,38,39,40,41,43,45,46,47,49》开：40对
018期：≌【24】≌《03,04,06,11,13,14,15,19,20,22,23,27,31,32,33,34,35,36,39,41,42,43,44,49》开：10错
019期：≌【24】≌《01,02,03,04,06,07,09,12,14,16,18,20,22,27,30,31,33,34,35,38,44,45,48,49》开：04对
020期：≌【24】≌《01,02,04,06,08,10,11,13,14,18,19,22,26,27,28,30,32,33,36,40,41,43,45,49》开：//