—I just heard that the tickets for tonight's show have been sold out.

—Oh, no！________.

A．I was looking forward to that

B．It doesn't matter

C．I knew it already

D．It's not at all interesting

硝酸银滴定液的标定

A．硫代硫酸钠滴定液
B．硫氰酸铵滴定液
C．EDTA滴定液
D．墓准氯化钠
E．硫酸铈滴定液