9个数字选5个有多少种组合

简介：The three Ruan brothers immediately looked at each other, and then burst into crazy laughter. They were laughing out of anger. The third Ruan brother pointed at Li Dao and said: "You must have lost your mind and gone crazy. We have always been the only ones to rob others, and why?" No one else dares to rob us. You are the first to say such things to the three of us. Could it be that you still don’t see the situation clearly?