http://us.f6.yahoofs.com/hkblog/rDkOb8SWERnmmaR4UeTpiIbmgvVT_1/blog/20100515121957855.jpg?ib_____DFxQXwNlG
(照慣例,不可用方程)
收錄日期: 2021-04-19 22:12:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100515000051KK00502