12个数字两两组合一共多少种情况

简介：Xiangcheng Uncle's Mansion is not far from the palace, and it only takes half an hour to walk there. Unexpectedly, Li Shouqi just escorted his son to Shiwangfu Street in front of the palace. In front of him were heavy brocades, and a large group of brocade guards were standing in the middle of the street with swords in hand. The leader was Wu Daozheng, the deputy commander of Jinyiwei.