氦
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氦(Helium)是一种化学元素,渠个化学符号是He,原子序数是2,是一种无色个惰性气体,放电辰光发橙红色个光。

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From Wikipedia, the free encyclopedia
氦(Helium)是一种化学元素,渠个化学符号是He,原子序数是2,是一种无色个惰性气体,放电辰光发橙红色个光。
Seamless Wikipedia browsing. On steroids.