题目

小明家通过ADSL接入因特网，现有两台配有无线网卡的笔记本电脑，要求在家中任意房间可同时上网，需要再配置的设备是（   ） A . 无线路由器 B . 分配器 C . 集线器 D . 服务器 答案：AIt is usually considered that living with disability is ________. [　　] A．challenged and frustrated B．challenged and frustrating C．challenging and frustrated D．challenging and frustrating