| 1. | It is desirable for the learners to develop their associative thinking and build their cognitive structure . although multi - media teaching possesses these unique advantages , it is double - edged 多媒体教学有利于创设良好的英语学习环境,拓展学生的思维空间,大幅度提高课堂教学效率,建构学生认知图式。 |