安徽省中考数学压轴题的命制 ,从 1 999年至2 0 0 2年连续四年出现了一个规律 :以几何图形为载体 ,模拟科学发现的思维程序 ,在问题的纵向延伸上探索研究几何图形的性质 .这种命题的考查目的着眼于考生对问题的探究能力 .1　 1 999年压轴题例 1　已知 ,如图 1 ,⊙Ｏ1与⊙Ｏ2 相 The fate of the mathematics problem in the middle school entrance exams in Anhui Province has followed a regular pattern for four consecutive years from 1999 to 2002: using geometry as a vehicle to simulate the scientific discovery process, and exploring the study geometry in the longitudinal extension of the problem. The nature of the graph. The examination purpose of this proposition focuses on the ability of the examinee to explore the problem. 1 In 1999, the finale was known as Example 1, as shown in Fig. 1, ⊙O1 and ⊙O2.