Вставьте артикль, где требуется

1. What … fine day it is today!

2. This … pencil is broken.

3. This is … tree. …tree is green.

Поставьте предложения во множественном числе

1. This is a chair.

2. I am at school.

3. This is a woman.

3. Вставьте some, any, или no и переведите:

1. 1. Are there … maps on the wall? No, there aren’t ….

2. 2. If I have … free time, I shall help you.

3. 3. My friend has … children.

Раскройте скобки, употребляя требующуюся форму прилагательного

1. 1. Which is (long) day of the year?

2. 2. Mary is as (young) as Ann.

3. 3. This road is (bad than any other.

Прочитайте и устно переведите текст. Перепишите и устно переведите 1 абзац

Перепишите слова в тетрадь с переводом на русский язык. Ответьте на вопросы для самоконтроля в письменном виде.

A. S. POPOV - INVENTOR OF THE RADIO

The wireless receiving set or radio is one of the greatest achievements of human genius. Priority in the invention of radio belongs to the Russian scientist Popov. On the 7th of May we celebrate Radio Day because on that day in 1895 the Russian scientist Alexander Popov demonstrated his first radio set to a meeting of the Russian Physical and Chemical Society.

A. S. Popov was born in 1859 in the Urals. While at school he spent all his free time on physics and mathematics He studied at St. Petersburg University and graduated from it with honors, but was not satisfied with the conditions of the laboratories of the University and ac­cepted the post of teacher in the Mining School¹ in Kronstadt. There he began his research in electrical engi­neering.

The greater part of his life he devoted to the problem of the application of electromagnetic waves to wireless communication.

Popov worked on a sensitive receiving set which could pick up² even the weakest radio waves. The year of 1895 is considered to be³ the date of the invention of the radio when Popov demonstrated his radio receiving set in operation. By the end of the year he improved his ap­paratus. It was the first radio receiving set in the world.

Since then, the art of radio communication has progres­sed a great deal.⁴ Many scientists and inventors made their contributions.

The radio has brought great changes to our life. At present the USSR produces equipment for powerful broad­casting and television centers, and for radio-relay stations, electronic computers, radar stations, telecontrol and tele- metric systems, and other purposes.

NOTES

1. the Mining School — Минная школа

2. pick up — ловить

3. is considered to be — считается

4. a great deal — много, значительно, сильно

5. achievement – достижение

6. priority – старшинство, очередность

7. invention – изобретение

8. to graduate – закончить(учебное заведение)

9. condition – условие

10. application - приспособление

11. research – исследование

Ответьте на вопрос: What problem was Popov interested in?

 

Вариант 2

 

1. Вставьте артикль, где необходимо:

1.She has … daughters. Her … daughters are students.

2. My friend has … car. … car is broken.

3…. butter is made of … milk.

2. Поставьте следующие предложения во множественном числе:

1. There is a boy in the room.

2. This is my brother.

3. That is a bush.

3. Вставьте some, any, no и переведите:

1. Have you got … money?

2. I have got … interesting book.

3. We have … English lesson today.

4. Раскройте скобки, употребляя требующуюся форму прилагательного:

1. The Volga is (long) river in Europe.

2. Health is (good) than wealth.

3. Which is (big) city in Russia?

5. Прочитайте и устно переведите текст.

Перепишите и письменно переведите второй, третий и четвёртый (до слов: The English System…) абзацы текста. Ответьте на вопросы для самоконтроля

PHYSICAL QUANTITIES AND UNITS OF MEASUREMENTS

1. Physics is a science based upon exact measurement, so you must be familiar with commonly used measuring devices and the units of measurements.

There are three basic concepts: length, mass and time. The units used to measure them are called fundamental units. All other units are called derived units because they can always be written as some combination of the three fundamental units.

To take a few examples

area = length x length

volume = length x length x length

speed = length\ time

density = mass\ length x length x length

2. There are two widely used sets of fundamental units: (a) the Metric System and (b) the English System.

The Metric System or the International decimal system of weights and measures is based on the metre and kilogram. Using metric units distance (length) is usually measured in millimeters, centimeters, meters or kilometers; time is measured in seconds, minutes, or hours; and mass is measured in grams or kilograms.

3. The English System uses the foot, yard and mile as units of length; the ounce, pound and ton as units of force and the second as the unit of time.

4. Тhе chief advantage of the Metric system over the English units is that all metric units are divided into 10 or 100 parts. This enables fractional distances and masses to be expressed as decimals. Decimals, it is well known, are easier to manipulate in the addition, subtraction, multipli­cation, and division of two or more quantities.

5. The Foot-Pound-Second (F.P.S.) System is used in Great Britain and the United States of America. The Metric System (metre-kilogram-second) is invented in France and accepted universally in science but not in engineering or commerce.

Vocabulary

1. concept –понятие, общее представление

2. to derive – получать, происходить

3. weights and measures – весов и мер

4. to measure – измерять

5. advantage – преимущество

6. to invent – изобретать

Ответьте на вопрос: What units are used to measure length, mass and time?

 

Вариант 3

1. Вставьте артикль, где необходимо.

1. We shall go to … cinema tomorrow.

2. My granny often tells us... long... interesting … stories.

3. … cheese is made of … milk.

2. Поставьте следующие предложения во множественном числе

1. My friend is single.

2. This is a girl.

3. That is my picture.

3. Вставьте some, any, no или оставьте пропуски незаполненными и переведите.

1. You may take … of my pens.

2. Are there... any new students in your group?

3. There is … ink in my pen: I can’t write.

4. Раскройте скобки, употребляя тре­бующуюся форму прилагательного.

1. The (long) is the night; the (short) is the day.

2. Which season is (cold)?

3. Oil is (light) than water.

5. Прочитайте и устно переведите текст. Перепишите и письменно переведите третий, четвертый и пятый абзацы текста. Ответьте на вопросы к тексту.

THE CONCEPT OF ELECTRICAL CURRENT

In the beginning of the 17th century Sir William Gilbert discovered that many substances could

be electrified by friction. Gilbert named this effect "electric" after the word "electron" —the Greek name for amber. In 1756 the Great Russian scientist M. V. Lomonosov was the first to make theoretical analysis of electrical phenomena.

At present the nature of electrification is explained by the electron theory. According to the modern theory all matter is composed of atoms or tiny particles. There are many kinds of atoms. Each atom consists of a nucleus, a small positi­vely charged mass and a number of lighter negatively charged particles called electrons, which revolve around the nucleus. Normally each atom of a substance is electrically neutral, or it has equal amounts of negative and positive charges, i.e. produces no electrical effects. If the number of negative charges is not equal to the number of positive charges, the matter will produce electrical effects.

When an electric charge is at rest it is spoken of a static electricity, but when it is in motion it is referred to as an electric current. In most cases, an electric current is described as a flow of electric charges along a conductor.

Not all substances are good conductors of electricity, as a general rule metals are good conductors of electricity, whereas nonmetals are poor conductors. The poorest of conductors are commonly called insulators or noncon­ductors. There are a large number of substances that are neither good conductors of electricity nor good insulators. These substances are called semi-conductors.

An electric current which flows in the same direction through a conductor or a current which does not change its polarity is called a direct current or a continuous current. Its abbreviation is D. C. An alternating current! (A. C.) flows first in one direction and then in the other.

An electric circuit is a path through which an electric current flows. This is a complete path along which electrons can transmit their charges. An electric circuit includes a battery, generator, or magnetic means for producing current flow. Some portion of the circuit is made to do useful work.

The circuit is said to be open when no charges can move due, to a break in the path. The circuit is said to be closed when no break exists — when switches are closed and all connections are properly made. Special symbols are used to show electrical systems.

Vocabulary

1. discover – открывать

2. substance – вещество

3. particle – частица

4. motion – движение

5. poor conductor – плохой проводник

6. semi-conductor – полупроводник

7. alternative current – переменный ток

8. direct current – постоянный ток

9. circuit – цепь

10. connect – соединять

11. arrangement – приспособление, приведение в порядок

Ответьте на вопрос: How are the substances that are neither good conductors of electricity nor good insulators called?

 

Вариант 4