我喜歡網路的世界,在這裡可以盡情發揮自己的創意和想像空間。如果你覺得我的作品還不錯,請大方的留言告訴我。您的支持就是我源源不絕的力量! 200905251539【六年級】水流問題01 【公式】 (順流速率-逆流速率)÷2=流速(小數) 重點:上行→代表逆流 (逆流而上)
Junyi Academy is derived originally from Khan Academy, and derived from Chengzhi Foundation. More information about Chengzhi Foundation, you can find under: http://kistschool.org/. More information about Khan Academy, you can find under: https://www.khanacademy.org/. |