继发于支气管阻塞的支气管扩张好发部位为（）
A.右肺上叶
B.右肺中叶
C.右肺下叶
D.左肺上叶
E.左肺下叶
参考答案：B
以下哪项为视网膜前出血（如图）表现（）
A.火焰状
B.半圆盘状
C.点状
D.大片状
E.黑色隆起
One thing that most organically grown food products seem to have in common is that they cost more than ________ grown foods.
A．apparently
B．contradictorily
C．conventionally
D．punctually
