固定桥的咬合力主要是通过哪个部分传递到颌骨上

A．固位体

B．桥体

C．连接体

D．基牙

E．黏膜

A local area network (LAN) is the communication of a number of computers by (68) connecting to each one in a single location, usually a single floor of a building or all the computers in a small company.

A．line

B．cable

C．copper

D．copper cash