載入中... 相關課程 Back 比率9 解決生活中有關百分率的問題2 登入觀看 ⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles. 比率9 解決生活中有關百分率的問題2 上傳學習單 下載學習單