Luminofores are widely used in modern technique, in particular in the production of luminescence lamps – a common feature of our everyday life.

Luminescence is also used in television, a luminous screen being an important part of television picture tubes. Luminofores enable also to discover and observe such radiations as ultra red, ultraviolet, X-ray and alpha that are invisible to the eye as well as fast-moving elementary particles produced by radioactive disintegration or artificial transformation of the atomic nucleus.

КОНТРОЛЬНОЕ ЗАДАНИЕ №3.

ВАРИАНТ 5.

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

The everyday life of Londoners is often seriously affected by the fog.

An excursion to places of historical interest has been organized at our Institute.

The new power station that is being built now in this town will produce

Thousands of kw of energy.

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

This new machine will be more effective than that of an old design.

It is not easy to solve this problem.

One seldom likes waiting for somebody.

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

They have to get up at 6 o’clock as their working day begins at 8.

You have much time to do this exercise, and it is not difficult.

The workers have improved their methods of work.

The expedition is to start next Sunday.

My favourite occupation is reading.

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

Water may be changed into ice by freezing.

We use a thermometer to measure temperature.

The only way of getting knowledge is to learn.

To read ancient mathematical tables was very difficult.

Looking out of the window you could see the new building of Moscow

University.

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

COMPUTERS

Computers are well known to represent a completely new branch of science, the first of them having appeared less than 60 years ago. Although still new, these machines are already bringing about a real revolution in science, technology, statistics and automatic control.

The reason for this is the fact that a mathematical formula can be found for almost all scientific and technical problems. They can be solved without a computer but it would require millions of arithmetical operations.

Electronic computer with a high speed can carry out several thousand arithmetical operations in one second. A calculation which would have taken several years of intense human work in the past is now done in a few minutes or hours. A number of various complicated problems have already been solved with the help of computers.

The principle of this wonderful machine lies in counting electric impulses. Numbers are represented as a sequence of such impulses and a radio-technical scheme counts them carrying out addition, subtraction, multiplication and division of all higher mathematical calculations being reduced to these four operations.

Electronic machines work according to a program prepared in advance which determines the sequence of operations. They have a very efficient electronic memory which stores the initial date, the intermediate numbers and final results as well as working commands given to the machine.

 

CONTROL WORK N 4

Для того, чтобы выполнить контрольную работу N 4, необходимо усвоить следующие разделы курса английского языка по рекомендованному учебнику.

1. Инфинитивные конструкции: сложное подлежащее (Complex Subject) и сложное дополнение (Complex Object).
2. Независимый и зависимый причастные обороты
3. Условные предложения.

 

I. ИНФИНИТИВНЫЕ КОНСТРУКЦИИ