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xue xi shu xue yao zhong shi ni xiang si wei
Author(s): 
Pages: 8-9
Year: Issue:  Z1
Journal: School Journal of Mathematics

Keyword:  逆向思维椰子学习数学正向思维逆定理猴子逆命题概念学习边长培养;
Abstract: <正>有一道趣味题是这样的:有四个相同的瓶子.怎样摆放才能使其中任意两个瓶口的距离都相等呢?可能我们琢磨了很久还是找不到答案.那么,办法是什么呢?原来,把三个瓶子放在正三角形
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