Thewaterplanet2高二英语课件
日期：2012-03-05 19:22
Unit13 The Water Planet1 What is the chemical structure of water?
Carbon & Oxygen
Nitrogen & Oxygen
Hydrogen & Oxygen
2 What is the freezing point of water?
A 0℃ B 100℃C 0℉
3What state is water in at room temperature?
A Liquid B Solid C Gas???4An ice cube can float on wate，
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