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初中化学演示实验改进二则长春吉林省教育学院赵宁长春吉林大学子弟中学郭春一、燃烧条件实验的改进在讲授义务教育化学教材第一章第四节燃烧和缓慢氧化一节内容时，学生对隔绝空气可以灭火很容易理解，但对将温度降低至可燃物着火点以下同样可以灭火，总是持怀疑态度。为...
Junior High School Chemical Demonstration Experiment Improvement II Changchun Jilin Provincial Institute of Education Zhao Ningchun Jilin University Junior High School Guo Chunyi Improvement of Combustion Condition Experiments Teaching Compulsory Education Chemistry Textbook Chapter 1 Section 4 Burning and Slow Oxidation Contents It is easy to understand that it is possible to extinguish the fire from the air, but it is always skeptical to lower the temperature to below the ignition point of combustibles. for...