X线诊断为胸腰段压缩骨折并脊髓损伤。为明确骨折向椎管内的移位情况，应选择

A．MRI

B．CT

C．ECT

D．X线断层摄影

E．脊髓造影

The view menu is used to display the document in one of several view modes. The view mode “______” makes it easy to look at the structure of a document.

A．Normal

B．Web Layout

C．Outline

D．Print Layout