题型:问答题 简答题 You can’t judge a book by its cover, ____________. A.as the saying goes oldB.goes as the old sayingC.as the old saying goesD.goes as old the saying 查看答案
题型:问答题 简答题 分子量为200的某种有机物配成1mmol/L的水溶液,用0.5cm的光径的比色体,使用某一波长光源,测得吸光度为0.100,问该物质的摩尔消化系数为A.20B.100C.200D.400E.10 查看答案