(a)(1800,4150)=9
(b)(1800,4158)=2
(c)(1800,4158)=6
(d)(130,231)=1
收錄日期: 2021-05-04 02:28:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20191108111803AA6hNHs