下列性质中,可以证明某化合物中一定存在离子键的是(   ) A、

下列性质中,可以证明某化合物中一定存在离子键的是(  

A、可溶于水             B、具有较高的熔点

C、水溶液一定能够导电   D、固态时不导电,熔融状态能够导电

答案

D

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