9个数字三中三有多少组什么公式

简介：Twenty plainclothes guards were divided into three groups, guarding the front and rear, and surrounded Zhu Cixiang upstairs. In fact, Zhu Cihong didn't like this kind of pomp. It was not only in the way, but also easily exposed. However, Tian Shouxin and the guards insisted on this, and he also Don't make it too difficult for them, so they can only reluctantly obey.