WHAT IS WATER?
作者：Edward Pang
1. can living things meet their daily needs without water?
2. Why does ice float on water?
3. How come not all substances are water-soluble?
4. Is water in all living things?
5. Is water harmful?
5.1. New node
6. What physical and chemical properties does water have?
7. how many states of water are there?
