题型:问答题 简答题 He got _____ by the police driving at 60 through Cambridge.A. caught B. to catchC. catchingD. to be catching 查看答案
题型:问答题 简答题 若某基准物质A的摩尔质量为50g/mol,用它标定0.2mol/L的B溶液。假定反应为A+2B→P,则每份基准物质的称取量为( )。A.0.1~0.2gB.0.2~0.4gC.0.4~0.8gD.0.05~0.1g 查看答案