--What's this?
-- _____a book [ ]
A. It
B. That
C. It's
D. That's
答案:C
支气管哮喘典型的临床症状是
A.反复发作性伴有哮鸣音的呼气性呼吸困难
B.胸闷
C.干咳
D.胸痛
E.咯血
痛经的主要病机是()
A.寒湿凝滞
B.血海空虚
C.胞脉失于滋养
D.阳虚内寒
E.不荣则痛