【判断题】Unregulated power supplies contain three basic components: a transformer, retifier and filter capacitor. Thi type of power supply, because of its simplicity, is the least costly. The disadvantage is t...
【判断题】(2017年高考试题,第90题,1分)在星型网络拓扑结构中,每个接入点只能连接一个设备。( )
【判断题】(2017年高考)在星型网络拓扑结构中,每个接入点只能连接一个设备。
【判断题】Unregulated power supplies contain three basic components: a transformer, retifier and filter capacitor. This type of power supply, because of its simplicity, is the least costly. The disadvantage is ...