如果已知某个由若干个小立方体组成的几何体的三视图,能不能求出组成这个几何体所需小立方体的个数呢?这既是同学们普遍感到比较困难的问题,也是中考的热点.解答问题的思路是这样的:先根据主视图和左视图确定出俯视图中每个小正方形相应位置上的小立方体的个数,再求出组成这个几何体所需小立方体的个数. If we know a three-dimensional view of a geometry composed of several small cubes, can we find out the number of small cubes needed to make up the geometry? This is not only a problem that students generally feel more difficult, but also a hot spot in the exam. The idea of ​​the problem is this: First, determine the number of small cubes at the corresponding positions of each small square in the top view according to the front view and the left view, and then find the number of small cubes needed to form this geometry.