单项选择题
Mary was nicknamed “Bloody Mary” for_______
A、She had illness in blood system
B、She was cruel to foreigner
C、She was cruel to Catholics
D、She was cruel to Protestants
点击查看答案&解析
某一元弱酸溶液的电离度为0.2%，则此溶液的
浓度为（ ）
