交警常用装有重铬酸钾k2cr2o7的仪器检测司机是否洒后开车因为洒中的乙醇分子可以使橙红色的重铬酸钾k2cr2o7变成绿色的硫酸铬 Template




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tomski交警常用装有重铬酸钾k2cr2o7的仪器检测司机是否洒后开车因为洒中的乙醇分子可以使橙红色的重铬酸钾k2cr2o7变成绿色的硫酸铬 coloring