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在复习立体几何时屡有学生问:什么叫棱柱?有“斜”的棱柱吗?“躺下”的棱柱还是柱吗?正棱锥与正四面体有何不同?为什么少写一句就扣分?平面几何中就是这样处理的为何在立体几何中算错?……,等等.这样的问题,每次都让笔者感到语塞.倒不是不知道怎么回答,不解的是学生怎么会问这样“低级”的问题.开始不以为然,但随着类似的问题或错误越来越多,而且问题一般出在那些学习比较认真也肯动脑筋的学生身上,笔者觉得这一现象的背
In the review of three-dimensional geometry, many students often ask: what is the prism? Have “oblique ” prism? “Lie down ” prism or column? Are positive pyramids and tetrahedrons are different? The deduction points? Plane geometry is how to deal with why the calculation in the three-dimensional geometry wrong ... ..., etc. This problem, each time let the author feel speechless. Not do not know how to answer, puzzled students how I would like to ask such questions as “low level.” At first I did not agree, but with more and more similar problems or mistakes, and the problems generally lie with those students who are more serious about learning to be brainy, I think this phenomenon Back