著名的数学家波利亚说：“一个专心地认真备课的教师，能够拿出一个有意义的但又不太复杂的题目帮助学生发掘问题的各个方面．”因此，对于一道题，特别是对于那些传统保留的好题，要从各个角度充分展示其背景、内蕴、身价．本人在高三进行数学复习时，选择了课本上一道不... The famous mathematician, Polya, said: “A teacher who is dedicated to preparing lessons seriously, can come up with a meaningful but not too complex topic to help students explore various aspects of the problem.” Therefore, for a question, especially for Those traditional good topics are to be fully displayed from all angles, including their background, intrinsicness, and worth. When I was studying mathematics in the third year, I chose a textbook that did not...