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在宏观和微观之间建立联系是化学学科的重要特点。
(1)在氯化钠、铁、过氧化氢三种物质中,由离子构成的是           
(2)下列微观示意图中,能表示化合物的是       (填序号,下同),能表示单质的是          

科目 化学   题型 填空题   难度 中等
知识点: 药品的分类
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is fly help whose house

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