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5 lines
194 B
5 lines
194 B
1 month ago
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问题2 如何认识自然数？
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数是对数量的抽象 / 数关系是对数量关系的抽象：大与小 / 可以有两种方法实现这种抽
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象：对应的方法和定义的方法
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