The trees____in the storm have been moved off the road.

   [ ]

A. being blown down    

B. blown down

C. blowing down    

D.to blow down

下列关于肺不张的X线表现，错误的是（）

A.邻近肺呈代偿性膨胀

B.纵隔向患侧移位

C.胸廓缩小，肋间隙变窄

D.肺门阴影增大

E.肺叶体积缩小，肺纹理消失