英语专八改错考前突击训练(23)
Most people would describe water like a colorless liquid. They __1__ would know that in very cold conditions it becomes a solid called ice and that when heating on a fire it becomes a vapor called steam. __2__ However, water, they would say, is a liquid. We have learned that water consists of molecules composed with two atoms of hydrogen __3__ and one atom of oxygen, which we describe by the formula H2O. This is equally true of the solid called ice and the gas called steam. Chemically there is no difference between the gas, the liquid, an... [ 查看全文 ]英语专八改错考前突击训练(23)的相关文章