Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
4 term СТ 28.11.doc
Скачиваний:
6
Добавлен:
02.05.2019
Размер:
798.21 Кб
Скачать

VI. B. A) Insert articles where necessary

1. Metals possess ... following properties. 2. All metals except mercury are ... hard substances. 3. ... lightest metal is lithium. 4. ... alloy is a mixture of two or more metals melted together. 5. Steel may be so keen that it will form ... cutting edge. 6. These varying properties depend on the nature of ... tempering. 7. Plastics have found ... wide application in many industrial fields.

b) Insert prepositions where necessary

1. ... general, they are good conductors of electricity. 2. An alloy is a mixture ... two or more metals melted together. 3. These varying properties depend ... the nature of the tempering. 4. Cast iron has low resistance ... impact. 5. Cast iron is weak ... tension and shear. 6. Plastics have found a wide application ... many industrial fields. 7. All ceramic building materials are divided ... two groups – porous and dense. 8. The wide assortment of ceramic products make them applicable in all sections of constructed buildings, ... the foundation ... the roof.

c) Choose the right variant

1. Metals (possess / possesses) the following properties. 2. All metals except mercury (is / are) hard substances. 3. In general, they (is / are) good conductors of electricity. 4. Non-ferrous metals (have / has) the following characteristics. 5. An alloy is a mixture of two or more metals (melting / melted) together. 6. Cast iron (have / has) low resistance to impact. 7. Steel (must / may) be brittle, supple, pliant or keen. 8. Plastics (found / have found) a wide application in many industrial fields. 9. All ceramic building materials (is / are) divided into two groups – porous and dense.

VI. C. Answer the questions

1. What properties do metals possess? 2. All metals except mercury are hard substances, aren’t they? 3. Are they good conductors of electricity? 4. What are the heavy and light metals? 5. What metals are soft? 6. What is the lightest and the heaviest metal? 7. What characteristics do non-ferrous metals have? 8. What is an alloy? 9. What are ferrous metals? 10. What is cast iron characteristic of? 11. What is steel characteristic of? 12. What do varying properties of steel depend on? 13. What are non-metals? 14. What applications have plastics found? 15. How may plastics be classified? 16. What characteristics do plastics combine? 16. What groups are all ceramic building materials divided into? 17. Where are ceramic products used?

VI. D. Speak on the classification of Metals and the characteristics and use of steel using the text, the Table and the following: I should say, as far as I know, as is known, n fact, it should be noted, to divide into

Table 1

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]