Химия Answer the questions просмотров - 254
1. What was the very first solid material that man began to use?
2. What did natural ceramics provide man with?
3. Why was ceramics used in a variety of applications?
4. What is a main characteristic of construction of ceramic crystals?
5. Why are ceramic materials so strongly resistant?
6. What are the principal elements in natural clays?
2. Translate the sentences:
1. The reaction of carbon with oxygen is highly exothermic. 2. Up to now chemistry has largely been a matter of taking natural products of the earth and converting them to man’s uses. 3. This element exists in two readily recognizable modifications: crystalline silicon and amorphous silicon. 4. Mercury oxide can be readily decomposed by heat. 5. There are many reactions which precede readily, some even violently, if a trace of water is present. 6. For nearly 2,000 years ago it was believed that all heavy objects fell faster than light ones. 7. One of the properties common to nearly all nuclear radiations are particles in their ability to ionize. 8. Hydrogen readily combines with fluorine and chlorine. 9. In many cases mixtures and compounds are not so readily distinguished. 10. There is hardly any living substance in nature which does not consist of compounds containing oxygen.
Note: hardly-ледве; highly-дуже, надто; largely-головним чином; nearly- майже; readily- легко.
3. Translate the following word combinations:
main industrial products; mainly in industry; primarily ionic; is of prime importance; the very substance; a very good substance; by means of; near the limit; the means of.
4. Find the pairs of synonyms:
because of, to provide, lately, to learn, to explain, due to, to supply, recently, to account for, to find out.
5. Find the pairs of antonyms:
hard, solid, fast, light, dull, difficult, heavy, bright, weak, easy, liquid, slow, soft, strong.
6. Open the brackets using the correct verb form:
1. Last year our plant (produced, produces) many ceramic goods which (are used, were used) widely. 2. At first man (baked, has baked) vessels of clay in the sun. 3. Recently ceramic compounds (are used, have been used) even in making steel. 4. Numerous analyses (have been carried out, had been carried out) before they stated the exact composition of this compound. 5. Now many scientists (are working, work) at the investigation of the new properties of ceramic. 6. Many new discoveries (took place, have taken place) since the last century. 7. Last week they (analyzed, analyze) crystal structure of the new materials by means of X-ray diffraction. 8. For many years considerable work (has been carried out, was carried out) to convert ethylene into motor fuel. 9. Many beautiful articles made of ceramics (provided, provides) man with tools even in ancient time.
Dates Ordinal numbers Cardinal numbers Exercise 5. Write down the following in figures.1. twenty-five million seven hundred thirty-two thousand 2. ten million five hundred sixty-seven thousand five hundred fifty-two 3. two million one hundred fifty thousand one hundred thirty-one 4. one million six hundred eighty-two thousand twelve 5. one point three million 6. sixty-seven thousand and five 7. two hundred thousand ninety-five 8. forty-five... [читать подробенее]
1. Exercise 2. Have a look at the adverbs in bolt. Find them in the UNIT and guess their meaning. Read the quotations and translate them. Exercise 1. Find the Russian equivalent. 1. to indulge in 2. to prefer 3. to introduce 4. to expect 5. to proffer 6. to squeeze 7. to exchange 8. to gain A. расценивать B. выражать C. предлагать D. приобретать E. кричать F. следовать G. избегать H.... [читать подробенее]
Ex. 59. Complete the following sentences about the important moments in history using the Past Continuous form of the verbs in brackets. Ex. 58Read the story and rewrite it in the past tense. Ex.57 Using the Past Continuous tense, fill in the blanks with the correct forms of the verbs shown in brackets. Ex.56 Using the Past Continuous tense, fill in the blanks with the correct forms of the verbs shown in brackets. Then rewrite the following affirmative statements as questions... [читать подробенее]
Ex. 48. Explain the use of the Simple Past in the following sentences. The First TV Soap Opera Ex. 47. Put the verbs in brackets into the Past Simple. The first TV soap opera (a) ……….. (appear) on American television just after the Second World War. Its name (b) ………. (be) Faraway Hill and it (c) ……….. (begin) on the 2nd of October, 1946. A famous Broadway actress, Flora Campbell, (d) ………… (play) Karen St. John, a rich New York woman who (e) ……….... [читать подробенее]
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Task 12. Fill in the blanks. Task 11. Guess the meaning of the international words using in the text. Task 10. Make up the questions. SUBMISSION SEAT 1) something to sitting on, e.g. a chair 2) a place where something is, or is located or based 3) a parliamentary constituency 4) membership in legislative body1) act of accepting the power or authority of another 2) legal theory, opinion presented to a judge or jury 3) the act of presenting something, e.g. a... [читать подробенее]
Task 10. Make up sentences using the following expressions. Judicial branch, according to, the highest tribunal, Chief Justice, to be appointed by, to be approved by, to alter, successful experience, to pass laws, to be authorized, principal duty, to be at stake. 1. What responsibility does the judicial branch have? 2. What kind of court is the judicial power vested in according to the Constitution? 3. Could you describe the Supreme Court of the USA? 4. What do you know about the... [читать подробенее]
Part two Discuss the following before you listen. You will hear an interview with Tim Rice, who wrote the lyrics for Part one The writerJesus Christ Superstar. It was first performed in the 1970s, but hasn’t been performed many times since. Andrew Lloyd Webber composed the music. a) What are some of the main events in the life of Jesus Christ? Who were some of the main characters in his life? b) Why do you think Tim Rice and Andrew Lloyd... [читать подробенее]
Ex. 3. Read and translate the text. The Randolf sisters, Sadie and Esther, live just a block away from each other. Sadie constantly complains that the people in town are cold and unfriendly, while Esther finds them warm and pleasant. Although Sadie can’t see it, the difference is in the way they approach those people. Sadie and her husband have a lovely house. It’s filled with beautiful antique furniture and glassware that is so fragile it could easily be broken by a careless guest... [читать подробенее]
Discussion Ex. 1. Read and translate the text. Ex. 2.Work in pairs. Ex. 1. Answer the questions. Discussion 1. What are the three types of housing mentioned? 2. What is the ratio of houses to flats in Britain? 3. What has happened to home ownership in Britain? 4. What sort of people in the UK are most and least likely to own their houses? 5. Explain the following: sheltered housing, a mortgage, a slum area.1. What differences are there between housing in... [читать подробенее]