反推了一下，这个菱形只能是正方形，x=c, y=d

来源: 芝麻于 2012-12-06 09:56:04 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.