The young man was against ________ trees. [ ]
A. plant
B. to plant
C. planting
D. planted
答案:C
下列图例中,表示公路的是[ ]
A、◎
B、
C、
D、
规定检查C组分的药物是
A.青霉素钾B.头孢羟氨苄C.罗红霉素D.硫酸庆大霉素E.盐酸美他环素