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2018年中考化学真题分类汇编2我们身边的物质考点14酸碱盐和氧化物3放置在空气中（无答案）.doc

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1酸碱盐和氧化物（18 通辽）6下列物质长期露置在空气中质量增大但没变质的是A小苏打 B.氢氧化钠固体 C.浓盐酸 D浓硫酸

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