对网络进行集中管理的最小单元并用来连接多个计算机或其他设备的连接设备是（）
A.HUB
B.ROUTER
C.PDH
D.PDA
参考答案：A
装饰用干花蕾
You should ________ your problems ________ your best friend, [ ]
A. talk with; about
B. talk about; with
C. talk to; about
D. talk with; with
