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看西湖科学家的爱情脑回路有多“野”
source link: https://tech.sina.com.cn/d/v/2019-08-07/doc-ihytcitm7547003.shtml
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男男女女都是谜“七夕”存在的意义，首先在于这个世界有男女之别。这是一个非常有趣的生物学现象。为什么人一定有男女之别、动物一定有雌雄之分？是哪只魔力之手决定了性别的产生？染色体！OK，许多物种的确是由染色体决定性别的，包括我们人类，男性的性染
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