随着新课程改革的逐步深入,广大数学教师在新课程理论的指导下,越来越重视在教学中设计适当的问题情境.《普通高中数学课程标准(实验)》明确要求:“教师要创设适当的问题情境,鼓励学生发现数学的规律和问题解决的途径,使他们经历知识形成的过程”.同时还对教材的编写提出要求: With the gradual deepening of the new curriculum reform, under the guidance of the new curriculum theory, the majority of mathematics teachers are paying more and more attention to designing appropriate problem situations in teaching. “General high school mathematics curriculum standards (experiment)” clearly requires that “teachers should create Appropriate problem situations encourage students to discover the laws of mathematics and the ways in which problems are solved, so that they can experience the process of knowledge formation. At the same time, they also require the preparation of teaching materials: