下列属于药品商品名的有()
A.阿司匹林
B.氧氟沙星
C.肾上腺素
D.白加黑
E.地塞米松
参考答案:D
解析:白加黑属于商品名称,其他属于通用名称。
若一个多边形的内角和等于1080°,则这个多边形的边数是( )
A.6
B.7
C.8
D.9
Without electronic computers, much of today’s advanced technology______achieveD.
A.will not have been B.have not been C.would not have been D.had not been