The significance of studying the network of mathematics lies in: (1) The procedure of building the network of mathematics knowledge is the procedure of understanding it.
研究数学知识网络的意义在于：（1）构建数学知识网络的过程是数学理解的过程；
At the last of this study, in order to enhance teacher's mathematics understanding of subject knowledge of probability.
预备教师和在职数学教师都存在概率学习的错误认知。
At the last of this study, in order to enhance teacher's mathematics understanding of subject knowledge of probability.
预备教师和在职数学教师都存在概率学习的错误认知。
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