載入中... 相關課程 Back 【觀念】什麼是梯形的上底、下底以及高? 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. 【觀念】什麼是梯形的上底、下底以及高? 上傳學習單 下載學習單