胸骨后甲状腺好发于（）
A.上纵隔
B.前纵隔
C.中纵隔中区
D.中纵隔下区
E.后纵隔
参考答案：A
— Why didn't you tell me the truth that day?
— I ________, but you ________ for Shanghai when I went to see you. [ ]
A. did; would leave
B. would; had been away
C. would have; had left
D. had; were away
论述我国城市产业结构的优化途径？
