28




先前资料链接
2010数学家?艺术家?人...
2003上帝是人

On this day@qiusir blog

One Response to “梯子密码N”

  1. qiusir Says:

    http://www.mysanco.com/index.php?class=wenku&action=wenku_item&id=35
    Jerusalem Chords Bridge
    耶路撒冷弦桥
    梯子包络线竟然是抛物线?

Leave a Reply