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“长江”、“黄河”两节是人教版义务教育教材地理第三册第五章的教学内容,是本章教学中的重点。内容难度不大,知识点多且分散。怎样才能使学生掌握这两条河流的概况及水文特性呢?“对比剖析法”将是最佳途径。它便于集中分散的知识点,使其系统化、层次化;便于学生在比较中全面掌握我国两条长河的概况、水文特性及在经济建设中的巨大作用。 一、概况对比(见下表): 二、长江航运和水能资源的开发 1.黄金水道:长江自古以来是我国东西航运的大动脉。 (1)长江流域自然资源丰富,经济水平高:在流域内有2700万公顷耕地(约占全国总量的1/4),农产品
The “Yangtze River” and “Yellow River” are the teaching contents of the fifth chapter of the Third Book of the Third Edition of the Teaching Materials for Compulsory Education of the People’s Education Press. It is the focus of this chapter’s teaching. Content is not difficult, knowledge is scattered and scattered. How can we make students master the general situation and hydrological characteristics of these two rivers? The “Comparative Analysis Method” will be the best way. It facilitates the centralization of dispersed knowledge points, makes it systematic and hierarchical, and facilitates students to comprehensively grasp the general situation, hydrological characteristics, and great role in economic development of the two long rivers in China. 1. Comparison of profiles (see the following table): II. Development of Yangtze River Shipping and Hydropower Resources 1. Golden Waterway: The Yangtze River has been the major artery of China’s East-West shipping since ancient times. (1) The Yangtze River Basin is rich in natural resources and has a high economic level: there are 27 million hectares of cultivated land in the basin (about 1/4 of the national total).