在高教部修改中等专业技术学校大纲时,把高等数学中极限部分改变成先讲无限小,后讲变量的极限,在实践中证明这是容易被学生接受的.但在平面几何教科书中极限部分的讲授却没有改变,因而给学生学习中带来了困难,给教师也带来了困难.为了使几何中极限的讲授和高等数学中极限的讲授一致起来,我们在授课中便将几何中的极限部分也改成先讲无限 When the Ministry of Higher Education revised the Outline of Secondary Specialized Technical Schools, it changed the limits of higher mathematics to the first to speak infinitely small, followed by the limits of variables, which proved to be easily accepted by students in practice. But in the limit of plane geometry textbooks The teaching did not change, and it brought difficulties to the students. It also brought difficulties to the teachers. In order to make the teaching of the limit in the geometry consistent with the teaching of the limit in the higher mathematics, we taught in the geometry of the The limit part also changed to speak first