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现在的中考题经常把课本题目进行升级改造,借助一些载体,进行深入挖掘,拓展延伸,从而派生出一系列题型.因此,在教学中我们老师要有意识地进行这一方面的训练,以培养学生的应变能力.本文介绍利用对称思想解决最值问题,便以同学们更好地掌握.在北师大版七年级下册第五章第三节“简单的轴对称图形”有一道课后习题:如图1所示,要在街道旁修建一个奶站,向居民区A、B提供牛奶,奶站应建在什么地方,才能使A、
Nowadays, senior middle school entrance exam questions are often upgraded and rebuilt with the help of some carriers, and then a series of questions are derived from them. Therefore, our teachers should consciously carry out this training in order to cultivate Student adaptability.This article describes the use of symmetry to solve the most value problems, we can better grasp of the students in the Beijing Normal University edition of the seventh grade fifth chapter third section “simple axisymmetric graphics ” there is a After-school exercises: As shown in Figure 1, to build a milk station next to the streets, to provide residential areas A, B milk, milk station should be built where it can A,