(a)x:y=2:3,y:z=3:4
(b)x:y=3:4,y:z=6:1
(c)x:y=6:5,y:z=10:3
(d)x:y=1:3,y:z=2:3
(e)x:y=5:6,y:z=10:3
(f)x:y=3:2,y:z=2:3
收錄日期: 2021-04-16 00:47:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100723000051KK01456