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Exercise 4. Put the words into the right order to make a true sentence.
1. Frequency is usually given in megahertz.
2. The box contains a dialog window.
3. There are different types of printers.
4. How can you protect a computer from virus?
5. This key does not have the right position.
6. Laptops are about the size of a small typewriter.
7. He can not install complicated programs.
8. Where do you see viruses?
9. What converts a word from audio signals into electrical signals?
10. Information is stored inside electronic registers in hardware units of the computer.
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