III. After-text Exercises

1. Give equivalents of the following words and expressions:

Основні компоненти; електричні коливання; підсилювач; інтенсивність; передача звуку; передача зображення; миттєвий; точність відтворення; суворий (жорсткий) контроль; взаємодія.

2. Say whether the following statements are true or false:

a) A typical radio communication system has three main components.

b) Essential components of a radio transmitter include an oscillation generator, amplifiers and a transducer.

c) The principal criteria of a radio in a commercial or military airplane, for example, are large weight and intelligibility.

d) The carrier frequency is generated by a carefully controlled quartz-crystal oscillator.

e) The oscillations are actually generated at high power by an electron tube.

3. Answer the following questions on paragraph 5:

a) What is the carrier frequency generated by in a typical commercial broadcasting station?

b) What is the fundamental method of controlling frequencies realized by?

c) What is used to stabilize the oscillations?

d) Are the oscillations actually generated at low power or at high power?

e) What dimensions are the crystal shaped to?

4. Translate paragraph 4 in writing.

5. Write out of paragraphs 2, 3 the words and word combinations describing the radio transmitter. Use them for describing the radio transmitter to your group-mates.

6. Read and translate the sentences paying attention to the Sequence of Tenses:

a) The post-graduate said that the material he needed was not available at present.

b) The student said that he comprehended the aim of the experiment.

c) She said that she had comprehended the main idea of the article.

d) I was asked whether I could describe the technique of scanning reading.

e) He was asked if he would be able to derive from that English book the information we needed for our experiment.

f) The teacher said that scanning reading would be of great help to engineering students.

g) The student said that this material was not directly related to the information he was looking for.

h) He said he would not deal with the description of this experiment.

i) The students were told that they didn't need to read reference books carefully.

j) She said that she had lost the sense of a phrase and stopped reading.

7. Put the predicate of the main sentence in the Past Indefinite

Tense and change accordingly the Tense of the subordinate clause:

a) We are informed that many scientists are working at the problem of radioactivity.

b) Newspapers write that atomic radiation is very harmful and that, therefore, the stopping of H - bomb tests will greatly contribute to human health.

c) The United Nations scientific committee reports that every nuclear test contaminates the world by radioactivity and increases the danger to human life.

d) Scientists announce that they have discovered important properties of radioactive substances.

e) People are sure that soon a spaceship will fly to other planets.

f) Our first astronauts say that many astronauts are being trained for space travels.

g) The students say they solve many important problems in the field of physics.

h) The lecturer says that every element is made up of minute particles, which are called atoms.

i) Scientist says he writes articles on the development of science and technology.

j) It is known that electronics is becoming increasingly important in all branches of production.

Lesson Two

I. Pre-text Exercises