为了有利于考生发挥水平,教育部发布的《关于2000年初中毕业、升学考试改革的指导意见》明确提出,在初中毕业、升学的数学考试中“应设计一定的结合现实情景的问题和开放性问题”。于是开放性题目是近几年中考的热点,几乎成为必考题型。从大处来看, In order to help candidates achieve their level of performance, the Ministry of Education’s “Guiding Opinions on the Reform of Secondary and Secondary Graduation Examinations in the Early 2000s” clearly stated that in the mathematics tests for graduating and graduating students from junior high schools, “a certain combination of realistic scenarios and openness issues should be designed.” problem". Therefore, the open topic is the hot spot of the middle school entrance examination in recent years and almost becomes a must-examination type. From a big point of view,