南京市2008年初中毕业学业考试数学第27题,在考查“圆与直线位置关系”上又有了新的探索与尝试.笔者有幸参与此题阅卷工作,有机会对本题做了较多的思考,对学生解答中出现的多种解法与典型错误有较多的了解,从而引发了对平时的数学教学工作的回顾与反思,有了一些认识,现撰写成文,与同仁们交流. At the beginning of the middle school examination in the middle school of Nanjing in 2008, the 27th question of mathematics, there was a new exploration and trial on the “relationship between the circle and the straight line”. The author had the privilege of participating in the examination of this question, and he has the opportunity to do more The students’ understanding of the many kinds of solutions and typical mistakes in the students’ answers has led to a review and reflection on the usual mathematics teaching work. With some understanding, they are now writing a essay and communicating with colleagues.