题目

下列物质中，能够导电的电解质是（  ）                                    A．Cu丝        B．熔融的MgCl2     C．NaCl溶液      D．蔗糖 答案：BA: How do you make fruit salad?B: ______ cut up three bananas and a watermelon.Next put them in a bowl.A．FirstB．NextC．ThenD．Finally