Если бы фотоны были не идентичными, то лазеры бы не работали

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We want the new production line to be installed at our plant

Мы хотим, чтобы новую производственную линию установили на нашем предприятии.

This device is expected to improve the production process.

Ожидается, что это устройство улучшит производственный процесс

Контрольное задание

Вариант 1

I. Перепишите предложения, подчеркните в каждом из них глагол-сказуемое, определите его время и залог; предложения переведите на русский язык.

This alloy will be used in modern technology.

Oxygen does not burn, but supports burning.

A molecule is made up of small particles called atoms.

Oxygen was discovered in 1774 by Joseph Priestly.

Mendeleyev arranged the elements in the order of their atomic weights.

II. Перепишите следующие предложения. Подчеркните Participle I или Participle II и установите функции каждого из них (укажите, является ли оно определением, обстоятельством или частью глагола-сказуемого); предложения переведите.

The air surrounding the Earth is a mixture of gases.

Being a light metal, alluminium is used in electric engineering industry.

When placed in a strong magnetic field, magnet gets magnetized.

Above certain temperature the tested metal changed its properties.

III. Перепишите следующие предложения. Подчеркните в каждом из них модальный глагол или его эквивалент, предложения переведите на русский язык.

Scientists must use new methods in their research work.

The chemist could easily define the properties of this solid.

Hydrogen can be used as a fuel in transport, industry and home.

The students had to work hard to improve the project.

IV. Перепишите и письменно переведите на русский язык текст.

METALS AND NONMETALS

Mankind has used metals for centuries in gradually increasing quantities but only now they are employed in really great quantities. Today we know more than seventy metals, most of them are used in industry.

Of all the metals iron is the most important one. Absolutely pure iron is never prepared except for laboratory purposes. The irons and steels in use today are really alloys of iron, carbon and other substances. They can be more elastic, tough, hard, or comparatively soft.

Mechanical properties of metals are the result of their atomic structure. They include hardness, ductility and malleability, which are of special importance in engineering.

There are some distinctions between metals and nonmetals. Metals are distinguished from nonmetals by their high conductivity for heat and electricity, by metallic lustre and by their resistance to electric current. Their use in industry is explained not only by those properties, but also by the fact that their properties, such as strength and hardness, can be greatly improved by alloying them with other metals.

There are several important groups of metals and alloys. The common metals such as iron, copper, zinc, etc. are produced in great quantities.

The so-called precious metals include silver, gold, platinum and palladium. The light metals are alluminium, berillium and titanium. They are important in aircraft and rocket construction.

Вариант 2

I. Перепишите предложения, подчеркните в каждом из них глагол-сказуемое, определите его время и залог; предложения переведите.

The world’s first nuclear power station began to generate electricity in 1954.

The power station will be reconstructed in a few years

Most of the world’s electricity is generated in power stations

Radium emits more powerful rays than uranium.

The first lightning rod was invented by B.Franklin

II.Перепишите следующие предложения. Подчеркните Participle I или Participle II и установите функции каждого из них (укажите, является ли оно определением, обстоятельством или частью глагола-сказуемого); предложения переведите.

Heating water, we transform it into steam.

Generators producing electricity get the power from steam or water turbines.

Steam engines were first tried in airplanes.

III. Перепишите предложения, подчеркните в каждом из них модальный глагол или его эквивалент, предложения переведите.

The electrical appliance must be earthed.

The engineer had to check power supply.

This mechanic will be able to repair any type of engine.

Heat energy can be converted into electricity.

IV. Перепишите и письменно переведите на русский язык текст.

SOURCES OF POWER

The industrial progress of mankind is based on power: power for industrial plants, machines, heating and lighting systems, transport, communication. In fact, one can hardly find a sphere where power is not required.

At present most of the power required is obtained mainly from two sources. One is from the burning of fossil fuels, i.e. coal, natural gas and oil. The second way of producing electricity is by means of generators that get their power from steam or water turbines. Electricity so produced then flows through transmission lines to houses, industrial plants, enterprises, etc.

It should be noted, however, that the generation of electricity by these conventional processes is highly uneconomic. Actually, only about 40 per cent of heat in the fuel is converted into electricity. Besides, the world resources of fossil fuels are not ever-lasting. On the one hand, the power produced by hydroelectric plants, even if increased many times, will be able to provide for only a small fraction of the power required in the near future. Therefore much effort and thought is being given to other means of generating electricity.

Using atomic fuel for the production of electricity is highly promising. it is a well-known fact, that one pound of uranium contains as much energy as three million pounds of coal, so cheap power can be provided wherever is required. However, the efficiency reached in generating power form atomic fuel is not high.

No wonder, therefore, that scientists all over the world are doing their best to fond more efficient ways of generating electricity directly form the fuel.

Вариант 3

I. Перепишите предложения, подчеркните в каждом из них

глагол-сказуемое, определите его время и залог; предложения переведите на русский язык.

Astronomers proved the law by experiments.

In small matters the law gives different results.

The new law of gravitation was produced by Einstein.

This device will be demonstrated in a technical laboratory.

Light is little affected by gravitation.

Applying the method, the scientists got the results desired.

The pressure increased was measured exactly.

The engineer is testing the power unit now.

He must illustrate this law by several experiments.

The students will be able to carry out this research themselves

This test can be dangerous.

The students had to solve some salt in water

IV. Перепишите и письменно переведите на русский язык текст.

GRAVITATION

Gravitation is a very important force in the universe. Every object has a gravitational pull which is like magnetism. But, unlike magnetism, gravitation is not only in iron and steel. It is in every object large or small; but large objects, such as earth, have a stronger pull than small ones.

Isaac Newton, the great scientist of the seventeenth century, first studied gravitation. When he was a boy, he often saw how apples fell to the ground. He wondered why they fell towards the earth and why they did not fly up into the sky.

According to the law which he later produced everything in the universe attracts everything else towards itself. The sun attracts the earth and the earth attracts the sun. The earth attracts the moon and the moon attracts the sun. Although the bigger object has the stronger attraction, 11 objects, in fact, have some attraction too but we do not notice the gravitational pull of a book because the pull of the earth is very much greater.

Why does the earth always move round the sun, and not fly off into cold space? The sun's gravitation gives the answer. The earth always tries to move away in a straight line, but the sun always pulls it back. So it continues on its journey round and round the sun.

The sun is one of the stars in the galaxy, in which there are about 100,000 million stars. It is not in the middle of the galaxy, but rathernear one edge.

There are millions of galaxies in the universe and so there are thousands of millions of millions of suns. Many astronomers believe that some of these suns have planets as our sun does.

Gravitation is the force which holds all the atoms of a star together. It holds the sun together and it holds the atoms of the earth together. It holds us on the earth.

Вариант 4

The unit of electricity “farad” was named after M.Faraday

A dynamo is often driven by a turbine.

Full-scale construction will start in several years.

There are several ways of producing hydrogen.

This new type of energy opened new prospects in industry.