题目

You're driving too fast. Can you drive         ? A. more slowly a bit                                 B. slowly a bit more C. a bit more slowly                       D. slowly more a bit 答案：C15．使用胆矾（CuSO4•5H2O）配制0.1mol/L的硫酸铜溶液，正确的操作是（　　）A．将胆矾加热除去结晶水后，称取16g溶解在1L水中B．称取25g胆矾溶于水，然后将此溶液稀释至1LC．称取25g胆矾溶解在1L水里D．将16g胆矾溶于水，然后将此溶液稀释至1L