颈部血管，后组脑神经位于（）。

A.咽后隙

B.颈动脉鞘

C.颌下隙

D.舌下隙

E.咽旁隙

___( )___ is the sending and receiving of the message by computer. It is a fast, low-cost way of communicating worldwide.

A．LAN　

B．Post office

C．E-Mail

D．Interface