预习是学生听课前独立地对教师所要讲的新教材进行的预先学习,是学生正式听课前的序曲、前奏、过门,是课堂学习中的有机组成部分。预习,可以提高学生的理解能力,锻炼学生的思考能力,增强学生分析、归纳、解决问题的能力,是培养学生自学能力的有效途径。学生会在预习中自觉或不自觉地将新旧知识联系起来,并运用己掌握的知识尽可能地解决新问题。由于学生预习中遇到了难点、疑点,他们带着这些不懂的问题听课,就增强了听 Preview is a pre-lecture to students independent of the new textbooks to be pre-learning, is the prelude to students prelude, prelude, crossing the door, is an integral part of classroom learning. Pre-study can improve students ’ability of comprehension, train students’ ability of thinking and enhance students ’abilities to analyze, summarize and solve problems. It is an effective way to train students’ self-learning ability. Students will be consciously or unconsciously in the preview of old and new knowledge linked, and use the knowledge they have mastered as much as possible to solve new problems. As the students preview difficulties, doubts, they took these problems do not understand the lectures, it is enhanced listening