对高中化学第三册第五篇第一章第六节“冶鍊金属的一般方法”这节教材,我们是这样考虑和分析的: (一)为什么在这节教材中要重复氧化和还原的定义氧化和还原的定义在本章第三节“金属的化学性质”中已經講过,为什么在这里又要重复呢?我們的体会觉得这样做是完全必要的,因为: 第一,教材开始就提出:“冶鍊金属就是把金属从它的化合物中提鍊出来,实质上就是使金属离子结合它所失去的电子,使离子变成原子。”接着再指出氧化和还原的定义,这就 We consider and analyze the textbook of “Metallurgy, Metallurgy, Metallurgy, General Methods,” in Chapter VI, Chapter V, High School Chemistry Volume III: (1) Why the oxidation and reduction should be repeated in this textbook DEFINITIONS Definitions for oxidation and reduction As already explained in Section III, “Chemical Properties of Metals,” in this chapter, why repeat here? Our experience felt that it was absolutely necessary because: First, the textbook was proposed at the outset : “Metallisation is the process of chain-linking a metal from its compound, essentially making the metal ion bind the electron it lost so that the ion becomes an atom.” Then we point to the definition of oxidation and reduction, which means