最常见的胸部损伤是（）。
A.肋骨骨折
B.开放性气胸
C.张力性气胸
D.血胸
E.胸壁软组织损伤
参考答案：A
下列描述中，正确的是（）。
A.自发性气胸时可引起咳嗽
B.化脓性胸膜炎咳脓性痰
C.肺水肿时痰液放置后可分三层
D.慢性肺脓肿为干性咳嗽
E.支气管肺癌可伴咯血
________ any other species, human populations are shaped by the usual forces of natural selection, like
famine, disease or climate. [ ]
A. Compared with
B. As with
C. As for
D. In addition to
