“良好的开端是成功的一半。”新课的引入,是课堂教学中一个不可忽视的重要环节,并且对整个教学有着非常重要的作用:一方面能引起学生听课的注意,安定学生的情绪;另一方面能激发兴趣,引发学习动机;再一方面还能起着承前启后,建立知识联 “A good beginning is half of the success.” The introduction of the new class is an important part of classroom teaching that cannot be ignored, and it has a very important role in the entire teaching: on the one hand, it can arouse students’ attention to the lesson and stabilize the students. Emotions; on the other hand can stimulate interest and stimulate learning motivation;