Санкт-петербургского государственного университета высшее профессиональное образование т. А. Степанова, И. Ю. Ступина
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1. Oxygen has been used ... undustiy... more than 100 years. 2. The actual development... the industrial application ... oxygen began ... the turn of the twentieth century. 3. Today probably 95 per c c n t... the huge volume ... oxygen is obtained ... the air. 4. This method is based ... the liquefaction ... air and its fractional distillation. 5. When calcium carbidc is treated ... water, it produces acctylcnc. 6 . Acctylcnc bums ... air ... a brilliant white light. 7. The greatest amount... oxygen is used ... cutting iron and steel. 35 Ex. 9. a) Cheek up if you remember the following: Прилагательные Полож!ггсльная степень Сравнительная степень Превосходная степень Односложные прилагательные long longer the longer/ Многосложные прилагательные difficult more difficult the most difficult Особые случаи good bad little much/many far better worse less more farther/ further the best the worst the least the most the farthest/ the furthest b) Translate the following adjectives into English and give their comparative and superlative forms: новый, хороший, большой, плохой, нктерссный, теоретический, много, легкий, высокий, маленький c) Translate the scntcnccs into Russian, paying attention to the adjectives. 1. The Russian language is more difficult than the English language. 2. This work is less important than that work. 3. Lesson 2 is more interesting than Lesson 1.4. What is the largest city in Russia? 5. Is the Volga longer than the Lena? 6 . Which is the oldest building in St. Pctcrsbuig University? 7. Which was the most difficult subjcct for you when you were at school? 8 . Who is the oldest in your group? 9. Most oxygen produced for industrial purposes is purer than 99 per ccnt. 10 . Some applications of oxy-acctylcnc process arc better known than others. 11 . One o f the most spectacular applications of oxygen in industry is for cutting iron and steel. 12 . Perhaps you will describe the most reccnt applications of the oxy-acetylcnc proccss. 13. Oxygen is men’s best friend. Ex. 10. Translate the sentences into Russian. 1. He told me that the Iccturc would begin at 3 p. m. 2. They knew student N was working at the laboratory. 3. As I hadn’t read this article before, I went to the reading-room. 4 . 1 thought she would bccomc a good student. S. When I camc to the laboratory, he had already gone home. 6 . Wc were told that even Lavoisier had been interested in oxygen. 7. The teacher explained how the substancc had been obtained in his laboratory. 8 . The hypothesis was very interesting but wc wanted to know how it had been developed. 9. Soddy showed that some radioactive elements had similar behaviour. 10. Mendeleyev predicted that more elements would be discovered and even described their properties. 1 1 . Early chemists thought that water was an element. 12. Their 36 experiment showed that not all isotopes were stable. 13. When wc came in, she had finished her experiment and was analysing the results. 14. Everybody knew that professor N was making experiments on the properties of substanccs. Ex. 11. Translate the sentences into English. 1 . Кислород уже давно применяется в промышленности. 2. Кис лород обычно получают из воздуха путем его сжижения и фракцион ной перегонки. 3. В техническом отношении этот процесс сложен. 4. Жидкий воздух — это очень холодная смесь жидкого кислорода и жидкого азота. 5. Когда карбид кальция обрабатывают водой, полу чается ацетилен. 6 . В настоящее время кислородно-ацетиленовая свар ка и резка металлов применяется почти во всех отраслях промыш ленности. 7. Огромное количество кислорода используется ежегодно для промышленных целей. 8 . Кислород— лучший друг человека. Он послужил спасению жизни многих людей. Ex. 12. Make up questions to the italicized parts of the sentences. 1. There has been interest in oxygen fo r several hundred years (2). 2. Today there is practically no industry which does not use the oxy- acetylene process (3). 3. Applications of the oxy-acetylene proccss arc divided into two fields — repair and production (3). Ex. 13. Answer the following questions: 1 . Who gave the name to oxygen? When? 2. What can you say about the industrial application of oxygen in the nineteenth century? 3. What industrial application o f oxygen is known best of all? 4. In what fields o f industry is the oxy-acctylcnc proccss used? 5. Why is oxygen callcd men’s best friend? жүктеу/скачать 5,96 Mb. Достарыңызбен бөлісу:
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