贵州省六盘水市2017年中考理综(化学部分)真题试题(含答案)
贵州省六盘水市2017年中考理综(化学部分)真题试题可能用到的相对原了质量:C12HlO16Ca40S32Al27一、选择题(本大题共8小题,每小题2分,共16分,在四个选项中只有一项符合题意,请把它选出来填涂在答题卡相应的位置)1.奇妙的物质世界在不断变化,下列没有发生化学变化的是A.光合作用B.使用稀盐酸除铁锈C.节日燃放礼花D.白炽灯通电发光2.下列实验操作正确的是3.参加六盘水市夏季国际马拉松赛的运动员,剧烈运动后感觉肌肉酸胀,原因是人体产生了较多的乳酸(化学式为C3H6O3)。下列关于乳酸说法错误的是A.乳酸属于有机物B.乳酸由3个碳原子、6个氢原子和3个氧原子构成C.乳酸中碳、氢、...
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