A:①③
B:①②③
C:①②④
D:①②③④
— Tom, look at those two girls!
—Oh, they look_________ because they are twin sisters.
为完全中和某一强酸溶液,需用10克溶质的质量分数为4%的NaOH溶液.如果改用10克溶质的质量分数为4%的KOH溶液,反应后,溶液的pH( )