一篇上乘的新闻稿件都有一个引人入胜的导语。同样，一堂数学课，也要有一段上下连贯、通俗易懂而又妙趣横生的导语。那么，怎样处理每堂数学课的导语呢？经过多年有意识地探索，我感到要设计出一段好的数学新课的导语，就必须做到导入的“准、奇、快”。所谓“准”，就是导语 An excellent press release has a compelling introduction. Similarly, a math class, but also have a coherent, easy-to-understand and fun guide. So, how to deal with each math class guide? After many years of conscious exploration, I feel that to design a good introductory math new class, I must be able to import “quasi-odd and fast”. The so-called “prospective” is the guide language