某溶液中n(K+)=n(Na+)=n(Cl﹣)=2n(SO42﹣),则该溶液可能是( )
A:KCl与Na2SO4的混合液
B:NaCl与K2SO4、MgSO4的混合液
C:NaCl、KCl、Na2SO4的混合液
D:Na2SO4、K2SO4、KCl的混合液
____ He's my brother.
____ Who's that boy?
____ Yes, she is.
____ Is she your mother?
____ No, he isn't. He's my teacher.
____ Is he your father?
若复数z满足:z+|z|=1+2i,则z的虚部为( )