单词：femto-becquerel
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单词：femto-becquerel 相关文章
The nineteenth century held one last great surprise for chemists. It began in 1896 when Henri Becquerel in Paris carelessly left a packet of uranium salts on a wrapped photographic plate in a drawer. When he took theplate out some time later, he was
发表于:2019-01-29 / 阅读(279) / 评论(0)
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