摘要: 【Among the natural enemy of mathematics, the most important thing is that how do we konw something, rather than to know something.】---毕达哥拉斯(前572-前497)解答: 阅读全文
posted @ 2017-09-08 08:30 M.T 阅读(216) 评论(0) 推荐(0) 编辑