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一、本章的教学法 [1]苏联中学化学教学法(第二分册),奚尤什金著,第187—188页。第一节“本章的意义和任务”。金属冶炼的科学原理是中等教育里必修的基本知识。对铁、铜、铝的物理性质和化学性质的认识,丰富了学生的知识,这种知识是使他们形成关于金属的一般概念所必需的。关于黑色冶金业(铸铁的冶炼)的简要知识促使学生理解国民经济上一些最重要的问题——为提高铸铁
First, the method of teaching in this chapter [1] Soviet middle school chemistry teaching method (second volume), Xi Yushijin, pp. 187-188. The first section “The meaning and tasks of this chapter.” The scientific principle of metal smelting is a compulsory basic knowledge in secondary education. Knowledge of the physical and chemical properties of iron, copper, and aluminum enriches students’ knowledge that is necessary to enable them to form a general concept of metal. A brief knowledge of the black metallurgy industry (smelting of cast iron) motivates students to understand some of the most important national economic issues -