优美的乐曲总要有前奏或序曲……演奏才会和谐、悦耳、浑然一体.课堂教学也是如此,新课导入的优劣,对上好整节课至关重要,因为导入部分在教学中起着承上启下的作用,它是一堂课中联结新旧知识的重要环节;并且也直接影响着学生的情绪、兴趣、注意力等.俗话说:“万事开头难”、“良好的开端,乃是成功的一半.”这些俗语也有力地证明了导入部分的重要性. Graceful music always have a prelude or prelude ... playing will be harmonious, sweet, seamless. Classroom teaching is also true, the advantages and disadvantages of the introduction of the new class, is very important for the good part of the whole class, because the import part from the teaching It is an important part of a class that connects old and new knowledge, and it also directly affects students’ emotions, interests, attentions, etc. As the saying goes: “All things are hard at the beginning,” “a good beginning Is half successful. ”These proverbs also strongly demonstrate the importance of the import part.