一、引言课堂教学应该是有序的,因为课堂教学是按照预先设计的程序展开的。但是,学生的知识水平、性格特点各异,加之外界环境的影响,课堂上难免会出现许多难以预料的意外事件。如果教师不能迅速控制局面,并加以妥善处理,势必会打断教师的思路,扰乱正常教学秩序,但如果能处理 First, the introduction of classroom teaching should be orderly, because classroom teaching is carried out in accordance with pre-designed procedures. However, students have different levels of knowledge and different personality traits. In addition to the influence of the external environment, many unforeseen surprises are inevitable in the classroom. If teachers can not quickly control the situation and properly handle it, they will surely interrupt the teacher’s thinking and disturb the normal teaching order. However, if teachers can handle