优秀教师读书分享会ppt:What does it take to make your water usable

来源:百度文库 编辑:高考问答 时间:2024/05/02 00:43:33
xie xie

如何使水可再被利用?

nothing! just put a barrel of it aside,several day later,it is edible!

What does it take to make your water usable
要使水能够使用,需要做哪些事情

是什么使你的水可以饮用的?