___ is different from that of the 19^th century.

A．New York of the 18^th century

B．The New York of the 18^th century

C．The New York of 18^th century

D．New York of 18^th century

坐骨神经痛最常见的原因是（）

A.腰椎管狭窄症

B.马尾肿瘤

C.隐性脊柱裂

D.腰椎间盘突出症

E.强直性脊柱炎