Back 【觀念】認識毫米,並用毫米為單位測量物長 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】認識毫米,並用毫米為單位測量物長 上傳學習單 下載學習單