题目

---How long has Daniel ______? ---Since 2010. A. made friends with you B. been to NanjingC. gone to Australia D.been married to Amy 答案：D两只串联的电解池，左池放CuSO4溶液，右池放一定量的某硝酸盐稀溶液，电解时，当左池析出1.6g铜时，右池析出0.45g固体，则右池中的溶质为（　　）A．AgNO3B．NaNO3C．Mg（NO3）2D．Al（NO3）3