山西省2016年中考理综(化学部分)真题试题(含答案)
山西省2016年中考理综(化学部分)真题试题第Ⅰ卷选择题化学部分可能用到的相对原子质量:H-1C-12O-16S-32Zn-65一、选择题(在每小题给出的四个选项中,只有以下符合题目要求,请选出并在答题卡上将该选项涂黑。每小题2分,共20分)1.我们每时每刻都离不开空气。空气中含量最多的气体是()A.N2B.CO2C.H2D.O22.我们每天要保证各种营养素的均衡摄入。以下食物主要提供蛋白质的是()A鸡蛋B大米C香蕉D黄瓜3.在牙膏中添加NaF等氟化物,具有防治龋齿的作用。则NaF中氟元素的化合价为()A.+2B.0C.-1D.-24.化肥的使用大大提高了粮食的产量。下列化肥属于磷肥的是()A...
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