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理学
氧
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oxygen
氧
化学元素,元素符号O,原子序数8,原子量15.999,属周期系ⅥA族。典型的非金属元素。
Astronomy
全称:oxygen。缩写:O
氧
Chemistry
>无机化学>无机化学基本概念与无机化合物>释义
oxygen
氧
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