中央型肺癌早期的间接X线征象是（）

A.阻塞性肺不张

B.支气管扩张

C.局限性肺气肿

D.阻塞性肺炎

E.纵隔及肺门淋巴结增大

Which of the following is NOT considered as part of the alimentary system ()

A．the pancreas

B．the spleen

C．the tongue

D．the cecum

E． the vermiform appendix