【单选题】51单片机的()口不仅可作为高位地址线,也是通用I/O口。
【简答题】电路交换网络中,在通信开始之前,先要在两端建立专用的通信路径。通信路径是节点之间形成的物理链路的序列。 In a network, a communication path is established between two before communication begins. The path is the of physical links connecting between node...
【判断题】We should pay attention to our first impression to others before communication.
【单选题】Before communication can take place it needs a ______