单项选择题

A.6.5;青霉素、链霉素各1000g
B.7.4;青霉素、链霉素各1000g
C.7.4;青霉素、链霉素各1000IU
D.6.5;青霉素、链霉素各1000IU
E.7.4;青霉素1000IU、链霉素2000IU