2013年湖南省邵阳市中考化学试卷(含解析版)
2013年湖南省邵阳市中考化学试卷一、选择题(共20小题,每小题2分,满分40分)1.(2分)在通常情况下空气中各成分的含量保持相对稳定,其中含量最多的气体是()A.氧气B.氮气C.二氧化碳D.稀有气体2.(2分)下列物质的名称、俗名、化学式表示正确的是( )A.二氧化碳、冰、CO2B.氢氧化钙、熟石灰、Ca(OH)2C.氢氧化钠、纯碱、NaOHD.氧化钙、石灰石、CaO3.(2分)近年来,北京、长沙等许多城市出现雾霾天气,形成雾霾天气的是空气中PM2.5含量的增加.PM2.5指的是( )A.SO2B.可吸入颗粒物C.NO2D.CO4.(2分)据报道,科学家发明了一种“月球制氧机”,这种“...
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