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zinc subgroup
释义
zinc subgroup
Encyclopedia
理学
短周期
释
zinc subgroup
锌分族
元素周期表上ⅡB族的元素。包括锌(Zn)、镉(Cd)、汞(Hg)、(Cn,第112号元素),均为过渡金属元素,其中为人造元素,具有极高的放射性。
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administrative reconsideration
administrative reconsideration committee
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Administrative Reconsideration of Public Security Cases
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administrative reform for tribal regions
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