任意两个数都有等差中项吗

简介：Damn it, are you a joke invited by the monkey? This thing doesn’t belong to you. It’s none of your business if I take it away. I’ve seen many shameless people, but for someone as shameless as you, I’m really the number one. times seen. Qin Fen said with a look of disdain, it was the first time he saw such a righteous nonsense.