生活知識-為什麼海水不能當飲用水喝？
Update: 2020-11-23
Description
地球表面約70%都是水，其中海水佔了97.59%，為什麼這麼多海水，確還是會缺少水資源，又為什麼海水不能當飲用水喝呢？
本集內容將簡單介紹
1.水對人體的重要性
2.說明滲透現象
3.海水不能當飲用水喝的原因
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