已赞,求赞。http://forum.eduzhixin.com/discussion/646/副本2%20物竞宣言
* 已赞,求赞
* https://forum.eduzhixin.com/discussion/691/%E7%89%A9%E7%AB%9E%E5%AE%A3%E8%A8%80%E9%92%A5%E5%8C%99%E5%95%8A%EF%BC%81%EF%BC%81%EF%BC%81
已赞,求互赞https://forum.eduzhixin.com/discussion/696/关于一道物理题减少运算量的方法【求赞】