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笔者近期参加了一次命题活动,命题过程一波三折,感受深刻,现把命题过程所经历的种种问题呈现出来,以期对大家有所启发,不当之处,请批评指正.命题要求是命制一道填空题,关于几何类的最值问题,这也是东营市中考第17题常常考到的类型.拿到这个问题,我想到前期曾经研究过的一道中考题.原题呈现:(2014年山东烟台)在正方形ABCD中,动点E,F分别从D,C两点同时出发,以相同的速度在直线DC,
I recently participated in a proposition, the twists and turns of the proposition process, feel profound, now the proposition experienced by the process of the various problems presented in order to give you some inspiration, criticism and correction, please correct me. , On the geometric value of the most value problems, which is the Dongying City Entrance Examination Question 17 often test type to get this problem, I think of a previous study has been a senior middle entrance exam questions. Original title is: (Yantai, Shandong Province) Square ABCD, moving point E, F from D, C, respectively, two points at the same time starting at the same speed in the line DC,