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复习要求 (1)常识性介绍 空气的成分及空气对人 类的重要意义;空气的污染与防治。 (2)认识氧气和氢气的物理性质及主要用 途;氧气的工业制法。 (3)了解氧气的化学性质。 (4)初步学会氧气的实验室制法。
Review requirements (1) Common sense introduction The composition of air and the importance of air to humans; air pollution and prevention. (2) Recognize the physical properties and main uses of oxygen and hydrogen; industrial production of oxygen. (3) Understand the chemical nature of oxygen. (4) A preliminary study of oxygen laboratory methods.