— I'm sorry to trouble you. Could I use your phone, please?

— _____. Here you are. [ ]

A. Yes, you could

B. Yes, you can

C. No, you can't

D. Sorry, you can't

进展期中央型肺癌的CT征象可以有（）

A.支气管狭窄

B.支气管梗阻

C.支气管壁增厚

D.支气管管腔内结节

E.肺门肿块