C2H4
C2H6
呢d係咩黎?
可唔可以每個解釋?
個電子圖係點畫?
更新1:
我係只得中3程度^^
我係只得中3程度^^
收錄日期: 2021-04-29 18:19:15
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080525000051KK01675