Output device is an instrument of ____ .
举一反三
- 以下哪个不是 output device？
- A touch screen is just an input device，not output device.
- The vacuum cleaner is a valuable labor-saving ______. A: device B: engine C: piece D: instrument
- Which of the following is both an input device and an output device? ( ) A: monitor B: scanner C: hard disk D: plotter
- Among the following devices, both belong to the output device and the<br/>input device ____. A: Hard disk B: Keyboard C: Mouse D: Plotter