A.x+y>2y
B.2-x< 2-y
C.x/-2>y/-2
D.2y<2x
希望能解釋給我聽,不要copy,感激!
收錄日期: 2021-04-30 22:09:41
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170604114218AA2kndK