第57章 缺乏關(guān)懷下的奮斗(3)
- 居里夫人自傳:夢想不設(shè)限
- 瑪麗·居里
- 4853字
- 2016-04-19 14:45:29
The activity of pure radium exceeded all our expectations.For equal weights this substance emits a radiation more than a million times more intense than uranium.To offset this,the quantity of radium c...
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