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selenium是什么意思及反义词

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名词 非金属元素,符号Se,原子序34
英语解释
  • a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)
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