2021年辽宁省大连市中考化学真题
【淘宝搜索店铺:中小学教辅资源店微信:mlxt2022】2021年全国中考试卷精选大连市可能用到的相对原子质量H-1C-12O-16Cl-35.5K-39一、选择题(本大题共15小题,每小题1分,共15分。每小题只有一个选项符合题意)1.下列变化中,属于化学变化的是A.滴水结冰B.矿石粉碎C.粮食酿醋D.干冰升华【答案】C2.元素与人体健康关系密切,下列元素摄入不足易产生龋齿的是A.IB.FC.ZnD.Fe【答案】B3.下列化肥中,属于复合肥料的是A.KNO3B.Ca3(PO4)2C.CO(NH2)2D.NH4HCO3【答案】A4.米饭为人体提供的主要营养素是A.油脂B.糖类C.蛋白质D.维生...
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