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我在教小学数学教材第九册第三章“长方体和正方体”时,曾反复钻研、琢磨这一章节与本册教材其它章节的内在联系以及本章各节之间的内在联系。这一章共
When I was teaching the third chapter “The Cuboid and Square” in the ninth grade of mathematics textbooks of primary school, I studied repeatedly and thoughtfully about the intrinsic linkages between this chapter and the other chapters of this textbook as well as the internal relations among the sections in this chapter. This chapter altogether