经常有同学来问问题,将题目往老师面前一摆——这个题我不会做!那么请问同学,你到底是哪里不会做?是哪里卡住了?你认真阅读题目没有?有图形的画出了图形没有?难道题目中的已知条件没有一个是你可以化简转化的?下面我们就从一个问题出发,来说明怎么寻找解题的突破口. Often have a classmate to ask a question, the title is put in front of the teacher - This question I will not do! Then I ask the classmate, where do you not to do? Where did you get stuck? Draw the graphics are not? Is the subject of a known condition is that you can simplify the conversion? Here we start from a problem, to illustrate how to find a breakthrough in solving problems.