《机械制图》中补图补线题是教学中的重点和难点,如何帮助学生闯过难关,迅速解题。笔者发现解题时存在几个不同的阶段,能掌握几个阶段的解题规律,保证质量,提高解题速度。 How to help students break through the difficulties and solve problems quickly is the key point and difficult point in the course of mechanical drawing. I found that there are several different stages of solving problems, can grasp the problem of several stages of the law to ensure quality, improve the speed of problem-solving.