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The Polya urn problem is a famous model of wide application in probability.
波利亚罐问题是概率论中的著名模型。
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To use Prompting Method by G Polya to form their metacognitive ability and improve their ability to solve math problems.
应用波利亚“提示语”培养解题的元认知能力，改进解题策略；
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