The cars in the auto show vary ______ price from $ 100,000 ______ $ 2 million, but they have attracted many customers.

A．in; to

B．with; and

C．of; with

D．from; to

一家诊所有八台个人计算机、四台打印机和一台绘图仪，全部连接在办公楼的网络上。这种类型的网络叫做（）

A．环型网 

B．星型网 

C．局域网 

D．广域网