I haven't got a raincoat. I'll have to buy __________.[ ]
A. each
B. some
C. any
D. one
答案:D
渗透泵型控释制剂的具有高渗透压的渗透促进剂().
A、醋酸纤维素
B、乙醇
C、PVP
D、氯化钠
E、15%CMC-Na溶液
正常人眼压为()
A.10~18mmHg
B.10~19mmHg
C.10~20mmHg
D.10~21mmHg
E.10~22mmHg