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竞赛活动辅导（五）立体图形程光弟（南昌市西湖区教研室）在小学数学中，学习了长方体、正方体、圆柱和圆锥这些基本立体图形的最基础的知识。本讲主要就这些基础知识作适当的延伸和扩展。训练的主要目标是：（１）进一步发展学生的空间观念，培养一定的空间想象能力。（...
(5) Three-dimensional graphics Cheng Guangdi (Nanchang Xihu District Teaching and Research Office) In elementary school mathematics, learn the basic knowledge of the basic three-dimensional graphics of cuboids, cuboids, cylinders and cones. This lecture mainly extends and expands these basic knowledge appropriately. The main objectives of training are: (1) to further develop the students' concept of space and cultivate a certain degree of spatial imagination. (...