有关副鼻窦黏液囊肿的描述,正确的是()
A.是恶性病变
B.由黏液腺分泌阻塞引起
C.由副鼻窦窦口阻塞引起
D.增强后呈明显强化
E.明显骨质破坏
参考答案:C
Many women work in big companies,but in the boardrooms of most big companies, women are in the _______.
A.scarcity
B.minority
C.majority
D.popularity
交接箱模块列号一面对交接箱顺序编号。()
A.自上向下
B.自左向右
C.自前向后