UNIT III

GRAMMAR. MODAL VERBS. SUBSTITUTE WORDS.

TOPICS. BELARUS. MINSK.

Belarus

Belarus is my homeland. It's the place where I was born and live now. Belarus is situated nearly in the centre of Europe, it borders on Poland in the west, on the Baltic States - Lithuania and Latvia - in the north-west, on Russia in the north and east and on the Ukraine in the south. Belarus occupies the territory of 207.6 thousand squarekilometres, it ranks 13th in Europe. The population of our country is about 10 million with more than 100 nationality groups. The share of the rural population is 31%. About 3 million Belarusians and their descendants live outside Belarus, mostly in Russia, Ukraine, the USA, Poland, and Latvia.

Belarus has a very long and rich history. It is believed that the formation of the Belarusian nation dates back to the 13th century when the Belarusian language and culture began to take shape. But according to some written documents the Belarusian statehood started to be formed as early as the 10 th century when prince Rogvold started his reign on Polotsk lands. From the 13th to the 16th centuries the territory of contemporary Belarus was the centre of polyethnic state - the Grand Duchy of Lithuania. It was one of the largest and most powerful slates in Eastern Europe. Then the Belarusian territory was a part of the Rzecz Pospolita. During that period the Belarusian culture and language were greatly influenced by the Polish. In the 18th century Belarus was under the Russian rule. Soon after the October revolution Belarus became a member of the USSR. In general, the history of our country was very difficult and dramatic; it proclaimed its sovereignty only at the end of the 20th century-in 1991.

According to the Constitution, Belarus is a presidential republic. The head of the state and the highest executive power is the President elected for a 5-year term. The executive power is also performed by the Council of Ministers headed by the Premier. The Prime Minister is appointed by the President. The Parliament – the National Assembly – is a representative and legislative body of the republic. It consists of two chambers: the House of Representatives and the Council of the Republic. The House of Representatives is formed on the universal, free, equal and direct suffrage by secret ballot. The Council of the Republic is the chamber of territorial representation. The judicial power in the republic belongs to courts. Control over constitutionality of regulatory acts in the state is exercised by the Constitutional Court.

With itsnumerous rivers and lakes, meadows and forests which cover one third of the country, Belarus is a unique formation with hundreds of remarkable species ofplants and animals. Belavezhskaya Puscha is the biggest and the most beautiful national park of the country. Rare bisons - aurochses - live here. Beresinski reserve, Pripyatski national park and many other territories are unique places where infinite nature is saved untouched.

The climate of the republic is moderately continental. The breathing of the Baltic Sea is constantly felt here and even during the coldest winter months the temperature may rise well above zero.

The mineral resources of the countrymeet the needs of the national economyin peat, potassium salts, building materials, underground fresh and mineral waters. But Belarus is poor in petroleum, gas, coal and metal, so they are the main items of Belarusian imports.

In spite of some serious economic problemsthatour countryhas faced over the recent years, Belarus can be named one of the most economically advanced regions among the countries, united in the CIS. Thanks to its good geographical position, advanced networkof transport and communications, skilled workforce the Belarusian industry is achieving a high level. Belarus has succeeded in industrial development ofsuch branches as motor industry, manufacture of tractors and agricultural engineering, machine tool industry and electro-technical industry, production of mineral fertilizers, wood-working and oil-refining. Such enterprises as MAZ, BelAZ, "Belaruskaly", "Azot", tractors "Belarus", TV-sets "Horizont"and "Vitiaz",watches and clocks "Luch",refrigerators "Atlant" are well-known both in our republic and abroad.

Belarus used to be called the land of bogs. Today a few million acres of land have been reclaimed for arable farming. The chief crops are potatoes, flax, rye and various fodder grasses. Belarusian flax products are among the main items of export and are well-known abroad.

Belarus possesses great scientific potential. The first step in the development of Belarusian science was made in 1921 when the BSU was opened, eight years later – the National Academy of Sciencesof Belarus which consists of more than 40 institutions. Nowadays the achievements of Belarusian scientists in different fields have gained international recognition.

Answer the questions:

1. Is Belarus your homeland?

2. Is it a place where you were born and live now?

3. What countries does Belarus border on?

4. What is the population of Belarus?

5. The formation of the Belarusian nation dates back to the 13^th century, doesn’t it?

6. When was the Belarusian statehood formed?

7. Who is the president of the Republic of Belarus?

8. How many Chambers does the Belarusian Parliament have?

9. Minsk is the capital of Belarus, isn’t it?

10. What is the structure of population in Belarus?

11. What is the biggest and the most beautiful national park of the country?

12. What mineral resources of the country do you know?

13. What are the main industries successful developing in the Republic of Belarus?

14. Are you proud to be a citizen of the Republic of Belarus?

Vocabulary

homeland – родина

border (on, upon) – граничить

population – население

descendant – потомок

statehood – государственность

perform – выполнять, осуществлять

survive – уцелеть

aurochses [o:roksis] – зубры

proclaim – провозгласить

infinite nature – бесконечное природное пространство

petroleum [pItrquljqm] – нефть

desert – пустыня

arable – пахотный

Vocabulary Notes

moderately continental – умеренно континентальный

mineral fertilizers – минеральные удобрения

unique features – уникальные черты

to proclaim sovereignty [sOvrqntI] – провозгласить независимость

according to the Constitution – согласно Конституции

Prime Minister – Премьер Министр

Premier – Премьер

The CIS – the Commonwealth of Independent States – CHГ

Council of Ministers – Совет Министров

the National Assembly of the Republic of Belarus – Национальное собрание Республики Беларусь

the Parliament – парламент

consists of two Chambers – состоит из двух Палат

1) the Upper Chamber – the Council of the Republic

2) the Lower Chamber – the Chamber of Representatives

judicial power – судебная власть

the Constitutional Court of the Republic of Belarus – Конституционный Суд Республики Беларусь

to succeed in smth – преуспевать в …

SELF CHECK

Ex. 1. Put the verb in the proper form and translate the sentences.

1. Belarus (to be) my homeland.

2. It’s the place where I (to be) born.

3. Belarus (to be) situated nearly in the centre of Europe.

4. Belarus (to occupy) the territory of 207.6 thousand square kilometres.

5. About 3 million Belarusians and their descendants (to live) outside Belarus.

6. Belarus (to have) a very long and rich history.

7. The Belarusian statehood (to start) to be formed as early as the 10^th century, when Prince Rogvold (to start) to reign on Polotsk lands.

8. The Grand Duchy of Lithuania (to be) one of the largest and most powerful states in Eastern Europe.

9. In general the history of our country (to be) very difficult and dramatic.

10. The head of the state and the highest executive power (to be) the President, elected for a 5 – year term.

11. The Prime Minister (to be) appointed by the President.

12. The Parliament – the National Assembly, (to be) a representative and legislative body of the republic.

13. The Parliament (to consist) of two Chambers: the Council of the Republic and the Chamber of Representatives.

14. The judicial power (to belong) to courts.

15. Minsk (to be) the capital of Belarus.

16. With its numerous rivers and lakes, meadows and forests which cover one-third of the country, Belarus (to be) a unique formation with hundreds of remarkable species of plants and animals.

17. The climate of the republic (to be) moderately continental.

18. The mineral resources of the country (to meet) the needs of the national economy.

19. In spite of some serious economic problems that our country (to face) over the recent years, Belarus can (to be) named one of the most economically advanced regions among the countries, united in the CIS.

20. Belarus (to succed) in industrial development of such branches as motor industry, manufacture of tractors and agricultural engineering, machine tool industry and electro-technical industry, production of mineral fertilizers, wood-working and oil-refining.

21. Belarus (to possess) great scientific potential.

Minsk-the Capital of the Republic of Belarus

Minsk is my native town. It is the capital of the Republic of Belarus and I am proud to be its citizen. Minsk is an ancient town with a rich history.

More than 2000 years ago on the banks of the Nemiga and Svisloch rivers came into existence the city of Minsk or Mensk as it was called before.The name of the city is believed to be associated with the river Menka that flowed into the lake Ptich not far from the city. But the legends say that the city derives its name from the word "mena" as in the ancient times there was a barter market on the right bank of the river Svisloch. Mensk was first mentioned in chronicles in 1067. In the 12^th century Mensk became the center of the independent Polotsk principality. In the late 13^th century the principality became part of the Great Duchy of Lithuania.

The 14^th -15^th centuries were very important in the life of Mensk and its inhabitants. It was the period when the Belarusian nation was formed with its national language and culture. In the middle оf the 16^th century the Lithuanian Princes united with the Polish Kingdom and formed a united state Rzecz Pospolita. It was at that period when Mensk was renamed into Minsk. Till the 18^th century the Belarusian people were vassals to Polish feudal lords who exploited them cruelly.

In the 18^th century (1793) Belarus was annexed by Russia and was turned into a province with Minsk as its center. In 1812 the Napoleon troops burnt the city almost to ashes. In the 20^th century the Belarusian capital underwent not once foreign occupation: in 1918 it was occupied by Germany; in 1919-1920 by Poland.

During the Great Patriotic War our capital was almost completely destroyed by the fascist invaders. We can say that in the post-war years it was rebuilt anew to become even more beautiful.

At present Minsk is the capital of the Republic of Belarus which is an independent state with its own state symbols, Parliament and President. It is a big developing city with the population of about 2 million. It occupies the territory of 200 square kilometers.

Every visitor of our city admires its beautiful buildings, wide streets and avenues, green parks and monuments. Minsk is also a big traffic center with a wide network of roads, railways, airlines and two Metro lines.

Minsk is the major industrial and cultural center and one of the most beautiful cities. The city has acquired its peculiar look and colouring thanks to the well-planned avenues and squares, to the green of the parks and gardens stretching along the Svisloch river, to its historical monuments.

There are hundreds of plants and factories in the city which produce various goods. Tractors and lorries, motorcycles and bicycles, TV-sets and watches, refrigerators and computers, textile and footwear are manufactured here. Our Belarus tractors and MAZ trucks enjoy a high reputation both in our country and abroad.

Minsk is also known as a city of science and students. There are many state and non-state institutions of education which train specialists in different fields of economy and social life.

The cultural life of the Belarusian capital is varied and very interesting. In Minsk there are many museums and exhibitions, theatres and concert halls, cinemas and libraries, clubs and concert halls. Among the theatres it is worth mentioning the National Academic Bolshoi Theatre of Opera and Ballet, the Yanka Kupala State Academic Theatre, and the Gorky State Russian Drama Theatre which are extremely popular with the public.

Minsk is a Hero-City. It was honoured with this title in 1974 for the courage and heroism displayed by its inhabitants during World War II.

Minsk today is a city with broad possibilities for development. Embassies, banks, business centers, public and private institutions, offices have been springing out in the city. Minsk is attractive and very romantic in all seasons of the year. This special city is beloved by its inhabitants and by all Belarusians.

Answer the questions:

1. How old is Minsk?

2. What is the past of the capital of the Republic of Belarus?

3. Where is Minsk located?

4. The Belarusians suffered a lot during the Great Patriotic War, didn’t they?

5. What goods are manufactured by the industrial enterprises of Minsk?

6. What are the main sights of Minsk?

7. Do you like to go to the theaters of Minsk?

8. Which of them are the most popular with the public?

9. Are you proud of your city?

Vocabulary

associate (v) – ассоциировать

derive (v) – происходить

chronicle (s-pl) – хроника, летопись

annex (v) – присоединять

inhabitant

citizen житель

resident

admire (v) – восхищаться

display – демонстрировать, проявлять

independent – независимый

occupy (v) – занимать

population – население

colour, colouring – колорит

Embassy – Посольство

Vocabulary Notes

the Great (Grand) Duchy of Lithuania – Великое Княжество Литовское

Polish Kingdom – Польское Королевство

to undergo occupation – подвергнуться оккупации

fascist invader – фашистский захватчик

to be proud of – гордиться

barter market – рынок меновой торговли

to be honoured with the title – быть удостоенным овации

to acquire its peculiar look – приобрести свой особенный вид

to spring out – появляться, возникать

feudal lords – феодальные властители (помещики)

to turn into – превращать (-ся)

to burn the city almost to ashes – сжечь город почти дотла

a big traffic centre – большой транспортный центр

state symbols – государственная символика

wide network of roads – широкая сеть дорог

to stretch along – простираться вдоль

to be extremely popular with the public – быть особенно популярным у публики

to enjoy a high reputation – пользоваться большой популярностью

to be beloved – быть любимцем

SELF CHECK

Ex. 1. Use the articles, read and translate the sentences.

1. Minsk is ... capital of the Republic of Belarus.

2. Minsk is ... ancient town with a rich history.

3. The name of ... city is believed to be associated with ... river Menka that flowed into ... lake Ptich not far from ... city.

4. But the legends say that ... city derives its name from ... word “mena” as in ... ancient times there was ... barter market on ... right bank of ... river Svisloch.

5. Minsk was first mentioned in ... chronicles in 1067.

6. In ... 12^thcentury Minsk became the center of the independent Polotsk Principality.

7. In ... late 13^th century ... Principality became part of ... Great Duchy of Lithuania.

8. ... 14^th – 15^th centuries were very important in ... life of Mensk.

9. In ... middle of ... 16^th century the Lithuanian Princes united with ... Polish Kingdom.

10. In 1812 ... Napoleon troops burnt the city almost to ... ashes.

11. In ... 20^th century ... Belarusian capital underwent not once ... foreign occupation: in 1918 – it was occupied by ... Germany; in 1919-1920 – by ... Poland.

12. During ... Great Patriotic War our capital was almost completely destroyed by ... fascist invaders.

13. At present Minsk is ... Capital of ... Republic of Belarus which is ... independent state with its own state symbols.

14. Minsk is also ... big traffic center with ... wide network of roads, railways, airlines and two Metro lines.

15. There are hundreds of ... plants and factories in ... city which produce various goods.

16. Minsk is also known as ... city of science and ... students.

17. Minsk is ... Hero-City.

18. Minsk was honoured with this title in ... 1974 for ... courage and heroism displayed by its inhabitants during ... World War II.

19. Minsk is attractive and very romantic in all seasons of ... year.

T E X T A

Study the meaning and pronunciation of the following words:

fission (n) [fiSn] – размножение путем деления клеток

enlarge (v) [in`lRG] – увеличиваться

split (v) [splJt] – раскалываться, расщепляться

elongation (n) [,JloN’geiSn] – удлинение

branching (n) [,brRnCIN] – ветвление

budding (n) [bAdiN] – почкование

observe (v) [qb’zWv] – наблюдать

liquid (n) [likwid] – жидкость

solid (n) [solid] – твердое тело

medium (n) [‘mJdjqm] – среда

nutrient (a) [‘njHtriqnt] – питательный

requirement (n) [ri’kwaiqment]

value(n) [‘vxljH] – величина, значение

acidity (n) [q’siditi] – кислотность

alkalinity (n) [,xlkqliniti] – щелочность

render (v) [rendq] – воспроизводить, приводить в состояние к-л.

in vitro - в лабораторных условиях

consist (v) [kqn’sist] – состоять

solution (n) [sq’lHSn] – раствор

aqueous (a) [‘eikwiqs] – водный

pure (a) [pjuq] – чистый, беспримесный

impurity (n) [im’pjuqriti] – примесь

provide (v) [prq’vaid] – обеспечивать

require (v) [ri’kwaiq] – требовать

digest (v) [dai’Gest] – переваривать

suitable (a) [‘sjHtqbl] – подходящий

enrich (v) [in’riC] – обогащать

Reproduction and Growth

Reproduction of bacteria is usually by fission: an individual cell enlarges and splits into two, each of the resulting pair being an exact replica of the parent cell (in the absence of mutation). Filamentous species reproduce by the elongation and branching of their filaments. A few bacteria multiply by a budding process. Methods of reproduction are almost invariably asexual, though a form of ‘sexual^’ mating has been rarely observed.

In the laboratory most bacteria can be induced to ‘grow’ (reproduce) in liquid or on solid culture media. Nutrient requirements, atmospheric conditions correct pH value (acidity or alkalinity) of the medium, osmotic pressures and temperatures are rendered optimum for the multiplication of species in vitro. Some bacteria will grow in a simple defined medium consisting of a few salts in aqueous solution (trace elements are provided by the impurities found in all chemicals, even those described as ‘pure^’). Others, including many pathogenic species, require protein degradation products, such as digested meat, in the constitution of media suitable for their growth. Some fastidious pathogens need media enriched with blood or other highly nutritious substances.

Say whether the following statements are true or false:

1. Methods of reproduction of bacteria are mainly asexual.

2. Bacteria never multiply by budding.

3. Bacteria usually reproduce by dividing into numerous parts.

4. Bacteria can’t be grown in the laboratory.

5. Numerous requirements have to be met in order to make bacteria reproduce in vitro.

6. The medium enriched with nutritious substances is required for some pathogenic bacteria.

T E X T B

Bacteria: their Construction

Bacteria are very small single-celled organisms (microorganisms) that exist in enormous numbers almost everywhere. They live in soil, water, air, and in living and dead animals and plants. A gram of soil can contain up to a thousand million bacteria, and there may be hundreds of thousands in a single drop of milk.

Bacteria differ from each other mainly in where and on what they live, and in the shape of their single cells. There are the spherical coccus types such as Staphylococcus and Streptococcus, which often occur in chains or masses, and the rod-shaped bacillus type such as Mycobacterium, which causes tuberculosis. Other disease-causing bacteria are Eberthella typhi (typhoid), and Vibrio cholerae (cholera). The type of bacterium which forms a coil or spiral is Spirillum.

Although bacteria cells are more complicated than viruses they are still very simple. Their structure has been worked out with optical microscopes which magnify by one hundred thousand times. All bacteria have a tough outer cell wall so their food must be soluble before it can be absorbed into the cell. In some bacteria there is a protecting layer of jelly enclosing the cell wall, and also one or more minute fibres (flagella) used for swimming. Inside the cell there is a coil of DNA and other chemical substances, but there is no definite nucleus or any of the other structures found in plant and animal cells.

Bacteria usually reproduce by simply splitting in two. When temperature conditions are favourable, about 37°C for most bacteria, they can divide about оncе every 30 minutes. In theory, one bacterium could form about 140 000 000 000 000 bacteria at the end of 24 hours. In fact, this does not happen because the supply of food soon runs out, poisonous wastes accumulate, and after a time no more bacteria can survive. Although most bacteria reproduce by dividing in two, some bacteria can reproduce sexually, during which the contents of one bacterium flow into another.

Bacteria are very tough. Different kinds can live in almost every environment, from hot springs to arctic frost. Many can form a type of spore under certain conditions. A spore is capsule inside which a bacterium can survive for years of drying out, intense heat or disinfectant. Few of disease bacteria can make spores.

CRAMMAR EXERCISES

PRACTICE MODALS

Ex. 1. Supply the necessary modal verbs.

1. I was very tired last night but I (не мог спать).

2. I had forgotten to bring my camera so I (не смог сделать) any photographs.

3. It was a great party last night you (следовало прийти).

4. Tom is not at work today. He (возможно болен).

5. You (не надо было спрашивать) him about it.

6. It’s a fantastic film. You (должен посмотреть) it.

7. I think you (следует купить) this dress.

8. Peter (должен был заплатить) a parking fine yesterday.

9. That restaurant (не может быть) very good. It’s always empty.

10. This is a valuable book. You (не должен потерять) it.

11. You have been travelling all day. You (должно быть) very tired.

12. I’d like to read Ann’s letter. The only problem is I (не могу найти) my glasses.

13. You (не должен помогать) him with his homework. It’s important that he does it himself.

14. I just want a general idea of the story so I (не нужно читать) all the book.

15. Why did you wash that suit? It was not dirty, you (не надо было стирать) it.

16. I don’t think you (следует смотреть) TV so much.

17. We (пришлось идти пешком) home last night. There were no buses.

18. I don’t want the children play in this room. They (могут разбить) something.

19. I am sorry that I didn’t take your advice I (следовало отправить) this letter a week ago.

20. Our teacher says that we (сможем говорить) English fluently in a few months.

21. Paul doesn’t like his new job. Sometimes he (вынужден) work at weekends.

22. This restaurant (должно быть) very good. It’s always full of people.

Ex. 2. Translate into Russian.

1. Water has to be thoroughly analysed during the epidemics.

2. Account has to be taken of the elastic properties of the body.

3. The lamprey must have existed at an early period.

4. Attention was to be paid to the climatic conditions.

5. This species cannot have emigrated from the North by two different routes.

6. Care is to be taken not to use methods of growing tissues on the surface of agar.

7. We know that previous to mutation there must have been a normal gene in place of the mutant gene.

8. The majority of the plant names have been taken straight from the chemical literature and taxonomists are bound to find some difficulty in interpretation.

9. Most species comprised in group 3 may have a very complicated origin.

10. It is to be regretted that the deserved attention was not given to their results.

11. It is to be emphasized that some acids are found in very few species.

12. It is to be noted that the aim was to be demonstrated the production of cells.

Ex. 3. Choose and use the appropriate modal verb from given in brackets.

1. These cells (need, can, must, to have to) be easily found in the roots as well as in the stem of that plant.

2. This plant (must, can, should) grow under such conditions rather well.

3. The roots of this plant (must, can, may, need) be used for human food.

4. Every student (may, can, should) know the difference between the leaves of oak and birch.

5. Such plants (need, must, should) have been cultivated by man long ago.

6. When water (must, may, to be (to), need) to be used for drinking it is necessary that microbes which it (to be (to), to have (to), may) contain (should, must, may) be killed.

7. You will (may, to have (to), to be (to), must) to study the characteristics of both plants as there (may, to be (to), must, can) be a considerable difference between them.

8. One (can, ought to, may, to have (to), should, must) to remember that this reaction is often followed by an explosion.

Ex. 4. Translate the sentences paying attention to Modals.

1. A great series of chemical changes has to occur before food becomes protoplasm.

2. These plant parts may have been found on and below the soil surface.

3. This list could be extended a long way.

4. Living protoplasm must always be thought of as a system in dynamic equilibrium.

5. Different techniques have to be used with microorganisms.

6. Hybrids may show characteristics of both parents.

7. The development of this disease must have been considerable favoured by high moisture conditions.

PRACTICE SUBSTITUTE WORDS

Ex. 5. Translate into Russian and pay attention to the substitute word “One”.

A.

1. One should take the precautions mentioned. 2. One believes that the procedure described above will simplify the experiment. 3. One may well ask why the two sheets of paper fly apart. 4. One is to make a lot of experiments to make sure that his observation is adequate. 5. When making experiments of this kind one is faced with still another difficulty. 6. One cannot fail to observe that the advance in technique grows more rapid. 7. Instead of numbers one might use symbols for numbers - algebra instead of arithmetic. 8. One may well ask why the numbers b and a are not identical, since they arise from much the same kind of process. 9. If one wishes to know whether or not a certain compound is present, one simply looks for a peak from that compound which would be expected in an otherwise clear region of the spectrum. 10. To know how a plant grows one should study the structure of the plant. 11. One can prevent the evaporation of moisture by means of the method which will check further loss of water. 12. One can find any book on botany in that library. 13. This is a very long distance if one takes into consideration their small size. 14. One must distinguish between processes due to the effect of biological clocks and the biochemical mechanisms of the clocks themselves. 15. By regulating the alternation of light and darkness, one can obtain three generations of sheep in two years. 16. When one says that a vessel is empty, it is not really true for the vessel is full of air. 17. One can improve the structure of the soil by proper treatment. 18. One should not forget that temperature plays an especially important role at the time of developing the root system. 19. One must always be careful when operating this machine. 20. To understand what laser is one has to understand how light is generated.

B.

1. It takes one much time to make all the necessary calculations. 2. The evidence provided by the author makes one believe that his hypothesis rests on sound foundation. 3. The figures presented involve one in the problems of modern statistics. 4. The computer allows one to make calculations in a short time. 5. Fast molecules do not diffuse through the rest as fast as their speed would lead one to expect. 6. His method permits one to get good results. 7. This led one to regard this problem as very complex.

Ex. 6. Translate into Russian and a pay attention to the substitute word “that/those”.

1. The electron temperature is much greater than that of the gas as a whole. 2. Unlike molecules can be determined by methods like those used earlier for like molecules. 3. The diameter of Neptunium is four times greater than that of the Earth. 4. The atomic weight of sulphur is twice as large as that of oxygen. 5. Suppose that the total volume of the gas is k times that of the molecule. 6. Molecules moving from hot regions to cool carry more energy than those moving in the reverse direction. 7. The tесhniquе used has some advantages over that suggested bу Раlm. 8. Тhе resu1ts are in good agreement with those calculated from the mobility data of Green. 9. Ву comparing actual strength of diffusion with that to bе expected if the molecules were elastic spheres, the value of s саn bе found. 10. Carbon dioxide cannot support life, its properties being different from those of the oxygen which it contains. 11. There are many kinds of potential energy besides that due to the force of gravity. 12. Two other very suitable temperatures are always generally available, those of melting ice and of boiling water - the former, constant under all conditions, the latter depending on the atmospheric pressure. 13. Molecules of light gases move quicker than those of denser gases. 14. There is a great difference between the functions of the leaves and those of the roots. 15. The soil of the South contains usually less moisture than that of the North. 16. Outdoor planting differs from that under glass in that the seed is not always soaked before planting. 17. The reproductive and life cycle of ferns is similar to that of the vascular plants just described. 18. Brown and Steward found that although the production of infective particles was inhibited, infectious RNA could be demonstrated at a level approaching that of control infected cells. 19. The mixture is identical to that mentioned above. 20. The minimum temperature for germination of the seed is much higher than that required for the general crop plants.

Ex. 7. Translate into Russian and pay attention to the substitute word “this/these”.

1. Тhе elements of the Periodic Group IA are called the alkali metals. Тhеsе are alike in having а single electron оn the outermost shеll. 2. The chief use of diffusion and thermal diffusion results is to determine the forces between unlike molecules. These can also be determined by methods like those used earlier for like molecules. 3. The speed of fast molecules means that they slip past the molecules which they meet without these having time to deflect them in their course. 4. If a gas molecule imparts energy to a wall molecule, this passes it on to other wall molecules. 5. We keep the ice-cream machine in the spare room. This is mainly used by the children. 6. Most American families are traditional. These comprise a father, mother, and one or more children. 7. Teenagers want independence. These feel that working parents are a benefit. 8. What does the word “politics” mean? This comes from the Greek word “police”, meaning the state or community as a whole.

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