通信系统模型有哪些？
参考答案：信源、发送设备、信道、干扰源、接受设备、信宿六个部分。
—How do you think I can make up with Johnson?
—Set aside ______ you disagree and try to find ______ you have in common. [ ]
A. what; what
B. where; what
C. what; which
D. where; which
基于网络的信息处理平台构件中，数据处理设备包括( )。
A．打印机
B．计算机
C．扫描仪
D．复印机
E．绘图仪
