题目

 The teacher asked me ____. A. when my uncle bought the car        B. when will my uncle buy the car C. when did my uncle buy the car        D. when my uncle will buy the car 答案：A 在25℃时，某稀溶液中由水电离产生的c(H+)=10-13mol/L。有关该溶液的叙述正确的是： （    ）   A ．该溶液的pH值可能为1        B ．水的电离受到促进 C ．水的离子积将变小         D． 该溶液的pH值一定为13