更新1:
若2a=3b和4b=5c,求a:b:c. ;
若2a=3b和4b=5c,求a:b:c. ;
收錄日期: 2021-04-20 14:38:50
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111226000051KK00393