九年义务教育教材《几何》第一册,以较为抽象的数学语言来介绍众多的概念(有人统计有100多个,其中黑体字的就有40多个).这众多的概念又是学习几何的基础,它们是为后面二、三册的学习而准备的.而任何 The first volume of the nine-year compulsory education textbook “Geometry” introduces many concepts in a more abstract mathematical language (some people have more than 100 statistics, of which there are more than 40 in bold characters). The many concepts are also learning geometry. Based on the basics, they are prepared for the next two or three volumes of study.