319期：大围：05,07,10,11,12,14,16,17,18,22,23,29,30,31,33,36,38,39,41,43,45,46,48,49（共半数）开45准
320期：大围：01,03,05,06,08,10,11,12,15,16,17,18,19,24,25,30,31,33,39,41,42,44,46,49（共半数）开28错
321期：大围：01,02,04,06,07,08,13,15,17,18,20,21,23,24,25,26,27,28,34,36,38,41,43,46（共半数）开？？√【？中？】