题目

室温下向10 mL 0.1 mol/L的醋酸溶液中加水稀释后，下列说法正确的是( ) A．溶液中导电粒子的数目增多，导电能力增强       B．醋酸的电离程度增大，c(H＋)也增大  C．溶液中K＝不变 D．醋酸的电离常数K随醋酸浓度减小而减小 答案：CHe wrote his ______ novel when he was ______.A. five; fiftiesB. fifth; fiftyC. fifth; fiftieth