Jiaxing is a small city. Therefore, to ______ the flow of traffic, the government has decided to broaden some main streets.

A．speed up

B．build up

C．put up

D．come up

不属于周围型肺癌的影像学特点的是下列哪项？（）

A.部分边界边缘较规则，中心易坏死形成空洞，多呈偏心性，内壁凹凸不平

B.往往表现为肺结节或肿块

C.边缘多有脐样切迹或深分叶、毛刺和胸膜牵拉

D.肿瘤内部常有小空泡

E.常出现叶段或全肺阻塞性肺不张或肺炎