宇宙空间存在着千姿百态、丰富多彩的图形,这些图形与我们的生活息息相关,了解和掌握这些图形的特性,对我们了解宇宙空间,更好地生活和生产是大有帮助的.在北师大版七年级《几何》(上册)第一章“丰富的图形世界”里,为我们认识一些常见的图形提供了一个良好的平台.建议同学们在学习中注意以下几点: There are various shapes and colorful graphics in the space of the universe. These graphics are closely related to our lives. Understanding and mastering the characteristics of these graphics is of great help to our understanding of space and better life and production. The first chapter of “Gravity” (Graded volume) in the seventh grade “Geometry” (Volume 1) provides a good platform for us to recognize some common graphics. It is recommended that students pay attention to the following points in their studies: