251期二位7胆:1,2,5,6,7,8,9250期二位7胆:0,1,2,3,4,8,9中249期二位7胆:0,2,3,5,6,7,8中248期二位7胆:0,1,4,5,7,8,9错247期二位7胆:1,2,4,5,6,7,9中246期二位7胆:3,4,5,6,7,8,9中