单项选择题
A.850mg B.900mg C.950mg D.1000mg E.1050mg
A.50%~60%和25%~30% B.55%~65%和20%~25% C.50%~60%和30%~35% D.55%~65%和25%~30% E.55%~65%和30%~35%
A.1/2 B.1/3 C.2/3 D.1/4 E.3/5