IV.Write the plural of the following nouns

1. church –             8. woman –      15. radio —

2. difficulty –        9. deer –            16. ox —

3. mouse –         10. leaf –              17. fish —

4. month –         11. goose –           18. wolf —

5. child –            12. potato –         19. country —

6. roof –             13. foot –              20. tooth —

7. boy –             14. dress –             21. curriculum

 

Министерство образования и науки Донецкой Народной Республики

Государственное профессиональное образовательное учреждение  

«Харцызский технологический техникум» государственного образовательного учреждения высшего профессионального образования «Государственное высшее учебное заведение «Донецкий национальный технический университет»

Дисциплина- «Иностранный язык»

Variant № 20     

I.Read and translate the text.

1. Native Tin is not found in nature. 2.The first tin artifacts date back to 2000 B.C.,3. However, it was not until 1800 B.C. that tin smelting became common in western Asia.4. Tin was reduced by charcoal and at first was thought to be a form of lead. 5.The Romans referred to both tin and lead as plumbum where lead was plumbum nigrum and tin was plumbum candidum. 6.Tin was rarely used on its own. 7.It was most commonly alloyed to copper to form bronze. 8.The most common form of tin ore is the oxide casserite. 9.By 1400 BC. bronze was the predominant metal alloy. 10.Tin is highly malleable and ductile.11.Tin is highly crystalline and during deformation is subject to mechanical twinning

 

П. Answer the questions to the text.

1. Is native tin found in nature?

2. When do the first tin artifacts date back?

3. What do Romans thought about tin?

 4. Where do we use tin?

 5. Is it resistant to corrosion?

III. Translate the words.

Native, tin, is found, nature, tin artifacts, alloy

 

IV.Write the plural of the following nouns.

1. church –             8. woman –      15. radio —

2. difficulty –        9. deer –            16. ox —

3. mouse –         10. leaf –              17. fish —

4. month –         11. goose –           18. wolf —

5. child –            12. potato –         19. country —

6. roof –             13. foot –              20. tooth —

7. boy –             14. dress –             21. curriculum

 

Министерство образования и науки Донецкой Народной Республики

Государственное профессиональное образовательное учреждение  

«Харцызский технологический техникум» государственного образовательного учреждения высшего профессионального образования «Государственное высшее учебное заведение «Донецкий национальный технический университет»

Дисциплина- «Иностранный язык»

Variant №21     

I.Read and translate the text.

SOME WORDS ABOUT METALLURGY

1. Metallurgy is one of the oldest of arts but one of the youngest of sciences. 2. Many of our metals were known in ancient times.3.It is only within the last century or two that the knowledge of the properties of the metals has made it possible to apply them in any extended way for industrial purposes.4. With the development of physics of metals, metallography, theory of heat treatment, and other phases of the science of metals, the field of metallurgy has broadened.

5. Metallurgy in this broader sense falls into three divisions: chemical or extractive, physical and mechanical. 6. Chemical metallurgy includes the metallurgical processes involving chemical change and the methods of production and refining.7. Physical metallurgy deals with the nature, structure, and physical properties of metals and alloys.8.Mechanical metallurgy includes the processes of working and shaping metals — processes which do not. involve chemical changes.