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气克打一字
更新时间: 2020-06-30 00:00:00  

读音”kè”。

一种惰性气体元素,无色、无臭,它存在于空气中,以体积计,在空气中占百万分之一,不易与其他元素化合,能吸收X射线,可用作X射线的屏蔽材料,亦可用来填充灯泡。

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