13. Complete the sentences with words from the text.

1. Scanners and cameras are … devices used to transfer images into a format that can be understood by computers.

2. A … lets you copy photos and printed documents into your PC.

3. It has become one of life’s most familiar sounds – the beep of the supermarket till whenever a … is scanned.

4. … scanners have a flat surface and take at least A4-sized documents.

14. Match these descriptions with the names of keys:

arrow keys, return, caps lock, shift, tab, escape, space bar, backspace, alt

1. A long key at the bottom of the keyboard. Each time it is pressed, it produces a blank space.

2. It moves the cursor to the beginning of a new line. It is also used to confirm commands.

3. It stops a program without losing the information from the main memory. Sometimes its use depends on the applications.

4. It works in combination with other keys to produce special characters or specific actions.

5. It removes the character on the left of the cursor or any selected text.

6. It produces UPPER-CASE characters (or upper-case character of the key).

7. It produces upper-case letters, but it does not affect numbers and symbols.

8. It moves the cursor horizontally to the right for a fixed number of spaces (in tabulations and data fields).

9. They are used to move the cursor, as an alternative to the mouse.

15. Translate into English.

Технология, используемая в сканерах похожа на технологию копировальных устройств. Вы кладете изображение лицом на стеклянную панель, и вдоль него движется сканирующая каретка с источником света. Отраженный свет попадает на три фоточувствительных полупроводниковых элемента, которые принимают информацию об элементах изображения. Изображение затем посылается в компьютер, где его можно читать и изменять по вашему желанию. Чтобы сканировать текст, нужна специальная программа, которая позволяет распознавать символы. Сканированный текст можно сохранить в базе данных или редактировать с помощью текстового редактора.

Есть три основных типа сканеров: планшетные, проекционные (слайд-сканеры) и ручные. Планшетные сканеры могут сканировать тексты, картинки и даже трехмерные объекты. Слайд-сканеры используются для сканирования 35 мм слайдов или негативных пленок. Они работают с очень высоким разрешением, поэтому они дороже планшетных. Ручные сканеры Т-образной формы, маленькие и компактные. Сканирующая головка не такая широкая, как на планшетных сканерах. Они копируют изображения шириной

до 4 дюймов.

Unit 7

1. Learn to use these words:

instant - an extremely short moment of time

This sort of account offers you instant access to your money. His face appeared for an instant at the window.

feedback - return of part of the output of a system to its source (so as to modify it)

to consume (energy), consumption - to use, esp. in large amounts

That's the trouble with those big powerful cars - they consume too much fuel. Many of the goods they produce are not for national consumption but for export.

to refer to - to mention, to describe or involve; to look for information or help

Does this information refer to me. He referred to a history book to find out the dates of the French Revolution.

resolution - a measure of quality of a display screen in terms of the amount of graphical information that can be shown on the screen

Specialists want sound, high resolution graphics and video.

quantity - the amount or number of smth.

Between us we consumed a vast quantity of food. The universe must contain large quantities of dark matter.

to glow - to produce a continuous light and sometimes heat

Polonium is so radioactive that it glows in the dark. Neon emits a characteristic red glow.

beam - a line of light or a line of radiation

The rabbit stopped mesmerized by the beam of the car’s headlights.

We could see the beam of searchlights scanning the sky.

(plasma) discharge - give or send out(liquid, gas, electric current) Lightning is caused by clouds discharging electricity.

angle - the space between two lines at the point at which they touch each other

The interior angles of a square are right angles or angles of 90 degrees.

to emit - to send out (a beam, noise, smell or gas) The alarm emits infra-red rays which are used to detect any intruder.

a wide range of - a set of similar things; area to which smth is limited

There is a wide range of opinions on this issue. The computer opens up a whole range of new opportunities. The temperature range was between eight and twelve degrees Celsius.

to range from ...to -to extend

Prices range between $50 and $200.This data manager can be used for tasks ranging from insurance to bird-watching.

to accept - to agree to take

The new telephones accept coins of any denomination. Do you accept credit cards? The manuscript was accepted for publication last week.