【名词&注释】
微型计算机(microcomputer)、微处理器(microprocessor)、操作系统(operating system)、二进制、基本知识(basic knowledge)、十进制数(decimal digit)、网络地址(network address)、输入输出设备(output equipment)
[单选题]is one kind of software absolutely necessary for every computer.
A. Operating System
B. Word processing
C. Keyboard
D. Center Processing Unit
B. 0.94 C. 0.992 D. 0.996