读了《中小学数学》初中(教师)版2007年第1～2期刘四新、郭刚的《对教学参考用书一个问题的看法》(简称“看法”)一文,觉得文中所论题目富有挑战性,引人入胜,且是开启学生智力、培养学生探索能力的一道难得的好题,并且参考答案中的图2给得蛮有意思,使 I read the article “Views on a Question of Teaching Reference Book” (referred to as “Views”) of Liu Sixin and Guo Gang from the 1st and 2nd issue of the Junior High School (Mathematics) Junior High School (Teacher) Edition in 2007. I feel that the topic in the article is rich. Challenging, fascinating, and it is a rare good question that opens the students’ intelligence and cultivates students’ exploration skills. It is very interesting to refer to Figure 2 of the answer.