2015年上海市中考化学试题及答案
2015年上海市初中毕业统一学业考试理化试卷化学部分相对原子质量:H—1C—12O—16Cl—35.5K—39Ga—40六、选择题(共20分)27.空气中含量最多的气体是()A、O2B、N2C、HeD、CO228、属于氮肥的是()A、K2CO3B、Na2CO3C、NH4HCO3D、Ca(H2PO4)2【21·世纪·教育·网】29、加碘食盐中的“碘”是指()A、分子B、原子C、元素D、单质30、属于物理变化的是()A、冰川融化B、铁钉生锈C、蜡烛燃烧D、食物变质31、生活中属于溶液的是()A、草莓酱B、蒸馏水C、蔗糖水D、玉米糊32、酒精(C2H6O)属于()A、混合物B、氧化物C、单质D、有机...
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