都说万事开头难,新课导入就是教学中艰难的一步。精彩的导课能激发学生的学习兴趣,起到情感传导的作用、架起教路、学路和作者思路之间的桥梁,起到开拓思维,调动学生积极性,为上好新课创造一种和谐愉悦的课堂气氛等作用,可见,教师巧 All things are hard to say at the beginning, the introduction of new courses is a difficult step in teaching. Wonderful guide lesson can stimulate students’ interest in learning, play the role of emotional conduction, set up a bridge between the teaching, learning and author ideas, play a pioneering thinking, mobilize the enthusiasm of students, to create a good new class Harmonious and pleasant atmosphere of the classroom, we can see that the teacher clever