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眾所周知,在0未被劃為自然數之前,自然數的計數單位是1,但在0劃為自然數之後,自然數的計數單位還是1嗎?答案是肯定的.大家都知道,0是自然數中最小的一個.0加1得1,1加1得2,2加1得3……這樣繼續下去可以得到任意一個自然…
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