251期:必出单双===>>>双数<<<===开30准

252期:必出单双===>>>单数<<<===开22错

253期:必出单双===>>>双数<<<===开16准

254期:必出单双===>>>单数<<<===开02错

255期:必出单双===>>>双数<<<===开44准

256期:必出单双===>>>单数<<<===开00准