3. Complete each sentence by choosing from the following devices: touch screen, trackball, touchpad, webcam.
1. Ais a stationary device that works like a mouse turned upside down.
You roll the ball with your hand to move the pointer on the screen.
2. Interactive.
..areused in museums, information centers and Internet
3. A
kiosks. You use your finger to point directly to objects on the screen. is used to send live video images via the Internet.
4. A ..is found on notebook PCs. You use it by pressing the sensitive pad
156
458
Ответы на вопрос:
1111111 ₂ = 127 ₁₀ у деда мороза 127 подарков 2⁴ = 16 (число месяца несет 4 бита информации) номер месяца может нести 1 бит информации, например 0 - текущий месяц 1 - следующий месяц итого: 4 + 1 = 5 бит
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