60-10/2=55

來源: FHZM 於 2012-04-13 20:35:03 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)
回答: how long had she been walking? 由 lilipp 於 2012-04-13 19:31:40
請您先登陸，再發跟帖！