广西南宁、北海、钦州、防城港2017年中考化学真题试题(含解析)
2017年广西北部湾经济区四市同城初中毕业升学统一考试化学试题(考试时间:90分钟满分:100分)可能用到的相对原子质量:H—1C—12O—16Na—23Mg—24Al—27S—32Cl—35.5Fe—56Ba—137第Ⅰ卷(选择题共40分)一、选择题(本大题有20小题,每小题2分,共40分。每小题只有一个选项符合题意,请用2B铅笔在答题卡上将选定的选项标号涂黑)1.下列不计入空气污染指数的项目是()A.氧气B.一氧化碳C.二氧化氮D.可吸入颗粒物【考点】空气的污染及危害。【解析】目前列入空气质量检测的物质有:二氧化硫、一氧化碳、二氧化氮、臭氧和可吸入颗物,氧气可供人类进行呼吸作用,不属于空气...
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