Тапсырма: Suggest solutions to one of these problems: 1.Make sure there are no viruses on a floppy-disk
2.Prevent unathorized access to a network
3.Avoid the risk of losing data
4.Avoid eye-strain when using computers
5.Avoid back problemswhen using computers
4) To avoid eye strain when using the computer, special eye exercises should be performed at a distance of 60 to 70 cm from the computer.
Объяснение:
правилно