1) (a+1)2次方+(a-2)2次方 =?
2)http://www2.filehost.to/files/2007-07-30_02/072837_b.jpg
呢張圖點計佢既體積?
THZ!
收錄日期: 2021-04-12 20:42:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070730000051KK02115