A.5A
B.5A
C.5/2A
D./2A
答案:C
– Must I get up early tomorrow morning?
– No, _________.
A.you mustn’t
B.I don’t think you have to
C.you can’t
D.you need
麝香具有特异强烈香气的成分是()
A.麝香醇
B.麝香酮
C.麝吡啶
D.雄甾烷
E.挥发油