运动变化是数学研究的对象之一,也是学生学习的难点。教师在教育教学中,如果能由浅入深,将问题变的简单、清晰,将动态的变为静止的,抓住静止的瞬间,这样会给学生的学习带来巨大的帮助。 Movement is one of the objects of mathematical research, but also difficult for students to learn. Teachers in education and teaching, if you can from simple to deep, the problem becomes simple, clear, the dynamic becomes static, to seize the moment, which will give students a tremendous help.