单项选择题
A （） is used to show you what the computer is doing. It is called （） equipment as well as the keyboard, the mouse and the printer.
A．moniter B．modem C．printer D．shower
A．-65 B．-64 C．-15 D．-1
A．每秒传输的字节数 B．每秒传输的字符数 C．每秒传输的位数 D．每秒传输的单词数