单词：becquerel(Bq)
可[勒尔](放射性活度单位)
单词：becquerel(Bq) 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(121) / 评论(0)
万物简史
万物简史