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教学目标:1、通过本课教学,使学生知道沉淀、过滤、消毒是水净化的常用方法。初步了解自来水的净化处理过程,蒸馏水和纯净水的用途。
Teaching objectives: 1, through the teaching of this lesson, so that students know precipitation, filtration, disinfection is the common method of water purification. Preliminary understanding of tap water purification process, the use of distilled water and purified water.