2014年天津市中考化学试题及答案
2014年天津市初中毕业生学业考试试卷化学第Ⅰ卷注意事项:1.每题选出答案后,用2B铅笔把“答题卡”上对应题目的答案标号的信息点涂黑。如需改动,用橡皮擦干净后,再选涂其他答案标号的信息点。2.本卷共15题,共30分。3.可能用到的相对原子质量:H1O16Mg24Al27S32Fe56Cu64Zn65一、选择题(本大题共10小题,每小题2分,共20分。每小题给出的四个选项中,只有一个最符合题意。)1.下列变化中属于化学变化的是()A.榨取果汁B.粉碎废纸C.切割玻璃D.燃放烟花2.PM2.5是指大气中直径小于或等于2.5微米的颗粒物。PM2.5漂浮在空中,进入人体肺泡,对健康影响很大。PM2.5...
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