— Why not take my car to the museum instead of walking. 

— No, thanks.______.[ ]

A. I'm able to

B. I've got to

C. I'm used to

D. I'm about to

支气管扩张最有意义的体征是（）

A.局限性哮鸣音

B.局限性湿啰音

C.贫血貌

D.消瘦

E.杵状指