17)
http://i729.photobucket.com/albums/ww291/kaka1307/0384-1.jpg
ans
a)2,3,4
b) 19/240
13)
http://i729.photobucket.com/albums/ww291/kaka1307/0381-1.jpg
ans: 18,272
pls show clear steps.
收錄日期: 2021-04-26 19:16:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110723000051KK00845