Вспомните образование страдательного залога — to be (в нужном времени) + 3-я форма глагола.

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12. Вспомните образование страдательного залога — to be (в нужном времени) + 3-я форма глагола.

- А. Найдите пять случаев употребления страдательного залога в тексте 1 и четыре случая — в тексте 2. Переведи­те предложения.

Б. Преобразуйте следующие предложения действительно­го залога в страдательный по образцу:

People widely use electronic devices. -Electronic devices are widely used by people.

1..Electronic devices control the work of power stations. 2. They calculate the trajectories of spaceships.

3. People dis­cover new phenomena of nature due to electronic devices. 4. Scientists designed a variety of tubes for specialized functions. 5. American scientists invented the transistor in 1948. 6. Inte­grated circuits greatly reduced the size of devices. 7. New types of integrated circuits increased packing density. 8. Electronics has extended man's intellectual power. 9. Scientists are looking for new ways for the improvement of integrated circuits tech­nology. 10. Jack Kilby developed the concept of integrating de­vice and built the first IC in 1958.

13. Прочтите текст (по вариантам) и озаглавьте его. Вы­полните письменный перевод текста по вариантам.

1.It is well known that the quick development of electron­ics began with the invention of transistors. They replaced elec­tronic tubes due to their numerous advantages. One of the main advantages of the transistors in comparison with the vacuum tube is absence of filament power loss. One of the principal causes of damages in electronic circuitry is high temperature. The heat causes breakdown of tubes and other circuit elements that are very sensitive to this influence. The transistor, on the other hand, does not heat its surroundings.

Another advantage of the transistor is its long life. The life of the average transistor is more than ten thousand operating hours. Because of its long lifetime and ruggedness, the transis­tor is very reliable and has much better efficiency in professional equipment.

2. As we know, transistors replaced electronic tubes due to their numerous advantages. One of the advantages of the tran­sistor is its small dimensions. Because of their small size, the absence of heating and other properties, transistors make it pos­sible to produce compact, small-dimensioned electronic devices which consume very little power.

In conclusion it is important to note that transistors revolu­tionized many fields of technology. They are successfully used for direct transformation of heat energy by means of thermal elements. They are also used to convert radiant energy into elec­tricity with the help of photocells or solar batteries. Light sources and lasers are built on the basis of transistors. They find wide application in computers, automatic devices, aviation, commu­nication, etc.

Notes____________________________________________

Filament power loss — отсутствие энергии на нити нака­ла

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