患者中年女性，于车祸后发生胸椎骨折，磁共振提示：胸10椎体爆裂骨折合并脊髓损伤，该患者损伤的脊髓是（）

A.胸段脊髓

B.胸腰段脊髓

C.腰段脊髓

D.腰骶段脊髓

E.骶段脊髓

______ controls the operation of the computer and performs it's data processing functions.

A．CPU

B．Disk

C．Memory

D．I/O