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科学家实现精子性别选择，是福还是祸？
source link: https://tech.sina.com.cn/d/f/2019-10-22/doc-iicezzrr3946223.shtml
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来源：科学媒介中心牟庆璇编译在我国很多地方，还存在着“重男轻女”的现象，尤其是老人，总想着抱孙子延续香火。根据国家统计局发布的消息来看，2018年我国大陆男性人口比女性人口多3164万人次。虽然我国近年来男女比例差值有所下降，但相对于全球绝
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