下列化学用语和名称相符的一组是 A.mgo2 氧化镁b.2h 2个氢元素c.2h2 2个氢分子d.ca 钙——青夏教育精英家教�—— Template




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tomski下列化学用语和名称相符的一组是 a.mgo2 氧化镁b.2h coloring