Контрольное задание №3. I. Перепишите и письменно переведите предложения

ВАРИАНТ 3.

I. Перепишите и письменно переведите предложения. Определите видовременную форму и залог сказуемого.

The construction of the oil center began after the plan had been adopted.

These text-books in chemistry were printed in our print shop.

A chain of thermal and atomic plants was built in 1970s in our country.

II. Перепишите и письменно переведите предложения, обращая внимание на разные значения слов it, that, one.

A barometer is an instrument that measures air pressure.

As the experiment was very interesting many people watched it.

One can easily forget foreign words that one does not use every day.

III. Перепишите и письменно переведите предложения, обращая внимание на разные значения глаголов to be, to have, to do.

Every candidate to the Institute has to take exams.

We did not know any student in that group.

He was the best football player of our school.

This new school building was to be ready last month.

Usually we have two lectures every day.

IV. Перепишите и письменно переведите предложения, обращая внимание на функцию причастия, герундия, инфинитива.

The teacher told the pupils to learn the poem by heart.

Seeing is believing.

The melting snow flows down from the roofs through pipes.

The transmitter operating on the low frequencies was constructed by these

Students.

V. Прочтите и устно переведите текст. Перепишите и письменно переведите 1, 2, 3 и 4-й абзацы.

ELECTROMAGNETIC WAVES

The conversion of sound waves into electric currents and the amplification of these currents are two basic electronic techniques required for record players, different electronic techniques.

There are many reasons why it is not possible to transmit radio waves of very low frequencies, but for one things (но, во-первых) the transmitting aerial will be impossibly large. It is therefore not possible to broadcast electromagnetic waves of audio frequencies, and for long-distance transmission it is necessary to resort to higher frequencies and therefore shorter wavelengths.

3. In general, electromagnetic waves are propagated through the Earth’s atmosphere in two ways: travel over the surface of the Earth, and waves, which leave the surface of the Earth.

Long waves are transmitted over ground and therefore lose a good deal of their energy in passing through ground obstacles; they consequently have only a limited range. The shorter waves escape more easily from the surface of the Earth. Very short waves pass through the ionosphere so they can be used for long-distance communication. This is why the range of TV stations is limited.

This problem has been overcome in recent years by the use of communication satellite. If the satellite simply reflects the radiation, it is called a passive satellite, where if it receives the signal and retransmits an amplified signal, it is called an active satellite.