课堂导入在课堂教学中至关重要，它能够引起学生的学习欲望，把学生的注意力集中于教师的课堂（王大宝，2001）。
Lead-in , as an indispensable section of a class , can not only arouse the students ' desire for knowledge but also draw their attention to the class ( Wang Dabao 2001 ) .
王大宝