1. Разделительный
Optical scanners are input devices that can “read” data recorded on paper, aren't they?
2. Общий
Are optical scanners a kind of input devices that can “read” data recorded on paper?
3. Альтернативный
Are optical scanners input or output devices?
4. Специальный
What kind of input devices can “read” data recorded on paper?
5. Вопрос к подлежащему
What is an input device that can “read” data recorded on paper?