在画物体的三种视图时,要求同学们把实物抽象成相应的几何体,在此基础上,分析几何体中各个面之间的位置关系,能够实现立体图形与平面图形互相转化,下面以北师大版教材《数学》九年级上册第四章中的练习作业为例,说明画三种视图时应注意的问题． When painting three views of an object, students are required to abstract the actual object into corresponding geometry. Based on this, the positional relationship between the faces in the geometry is analyzed, and the three-dimensional figure and the plane figure can be transformed into each other. Examples of exercises in the fourth edition of the large-scale textbook “Mathematics” in the ninth grade booklet explain the problems that should be noted when drawing three views.