脊柱的下列哪一节段容易发生退行性改变
A．C1,2
B．C7～T1
C．T10～T12
D．T12～L1
E．L5～S1
参考答案：E
— Jane, you look so smart in a Chinese Tang costume today.
— ________, Maria. [ ]
A. You're welcome
B. Of course
C. Thank you
D. No
《罗拉特法》，《华格纳法》，《威斯敏斯特法》
