和定最值问题口诀简介：Qin Fen, who was answering with all his strength, naturally didn't know the little girl's random thoughts. After spending a few minutes filling in the answers, he said: "Xiaoyu, you can leave now, I want to go back."
Qin Fen, who was answering with all his strength, naturally didn't know the little girl's random thoughts. After spending a few minutes filling in the answers, he said: "Xiaoyu, you can leave now, I want to go back."
