椎管狭窄症包括：（）
A.椎管狭窄
B.侧隐窝狭窄
C.椎间孔狭窄
D.椎间盘疝
E.椎间盘变性
参考答案：A, B, C
—What do you think of the performance today?
—Great!____but a musical genius could perform so successfully.
A．All
B．None
C．Anybody
D．Everybody
Tg在人体内的正常来源是（）。
A.肝脏
B.胰腺
C.甲状腺
D.肾上腺
E.脾脏
