9个数字有多少种组合方法

简介：The old man Huangsha placed the white jade board on the ground, then pressed several yellow jade stones in his hand into the grooves correspondingly, then bit the tip of his tongue and squirted a mouthful of blood on the white jade board. Suddenly, the lines on the jade board seemed to be When activated, white mist appeared one after another, absorbing the mouthful of blood completely.