填空题:阻燃剂大多数是元素周期表中VA,VⅡA和( )族元素的化合物。 题目分类:基础知识 题目类型:填空题 号外号外:注册会员即送体验阅读点! 题目内容: 阻燃剂大多数是元素周期表中VA,VⅡA和( )族元素的化合物。 参考答案: 答案解析:
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