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一、选择题1 下列说法中 ,正确的是( ) .(Ａ)盐的组成元素中一定不含氢元素(Ｂ)任何溶液中阴、阳离子的总数一定相等(Ｃ)能导电的溶液中一定存在自由移动的离子(Ｄ)凡能电离出氢氧根离子的化合物一定是碱 (2 0 0 1年江苏省南通市中考题)2 下列电离方程式中 ,正确的是 (
1. Multiple-choice questions 1 In the following statements, the correct answer is () (A) The constituent elements of the salt must not contain hydrogen (B) The total number of cations and cations in any solution must be equal (C) The conductive solution must be There are free-moving ions (D) Compounds that can ionize hydroxide ions must be alkali (2001 Nantong City, Jiangsu Province). 2 The following is the correct ionization equation (