在高中生物课本第二章的“能量代谢”内容中讲到:“葡萄糖在体外燃烧,能量是一下子放出来的,而葡萄糖在体内氧化分解,要经过许多中间步骤,能量是逐步释放出来的。”为了使学生准确理解这句话,有必要给学生提供感性知识,为此,笔者设计了葡萄糖体外燃烧的演示,并在课上讲述这部分内容时向学生演示,方法如下; In the content of “Energy Metabolism” in Chapter 2 of the High School Biology Textbook, “Glucose is burned in vitro and energy is released all at once. However, glucose is oxidized and decomposed in the body. After many intermediate steps, energy is gradually released. In order to enable students to understand this sentence accurately, it is necessary to provide students with emotional knowledge. For this purpose, the author designed a demonstration of the external combustion of glucose and demonstrated it to students in the class. The method is as follows;