题目

 0.01mol・L－1的某一元弱酸溶液的pH＝4，则它的电离度为（    ）     A. 1%                B. 2%                   C. 5%                  D. 10% 答案：A  —Hello! This is Henry Speaking. I’d like to speak to your father.—Sorry, he has         Shanghai.A．been inB．been toC．gone toD．come to