一、问题的提出纵观国内外的数学课程标准,都要求培养学生的空间能力,并且对此提出了具体的要求.在我国初中的课程设置上,几何部分主要是在扩大的公理化体系中,运用演绎的方法证明有关平面图形的性质.但是在日常生活中,学生早已接触了各种各样的三维物体,[1]我们认为初中生已经 First, the issue raised Looking at the mathematics curriculum standards at home and abroad, all require the training of students’ spatial ability, and put forward specific requirements for this. In the curriculum setting of junior middle school in China, the geometric part is mainly in the enlarged axiomatic system. The method of deduction is used to prove the nature of plane graphics. However, in daily life, students have already been exposed to a variety of three-dimensional objects. [1] We think junior high school students have already