___Hi, Tom._____?

___ well .Long time no  see! I miss you very much.

A． What are you doing

B． What is going on

C．How do you like it

D． How is it going

某患者因哮喘发作来诊，在诊断尚未明确时，为缓解症状应选用（）

A.肾上腺素

B.强心苷

C.异丙肾上腺素

D.氨茶碱

E.哌替啶