B．二硫化铁C．三氧化二砷D．硫化砷E．硫化汞信石的主成分是B型题

作者: rantiku 人气: - 评论: 0

问题 B．二硫化铁 C．三氧化二砷 D．硫化砷 E．硫化汞信石的主成分是

选项 B型题

答案 C

解析

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