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从精原细胞→初级精母细胞→次级精母细胞→精子细胞→成熟精子，这个过程要（）：

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从精原细胞→初级精母细胞→次级精母细胞→精子细胞→成熟精子，这个过程要（）：

A.20分钟

B.一天

C.一个月

D.大约三个月

参考答案:

答案：大约三个月

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