Санкт-петербургского государственного университета высшее профессиональное образование т. А. Степанова, И. Ю. Ступина
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Ex. 1. Think of situations when the following expressions may be used: sorry, I’m sorry, excuse me, that’s all right, never mind, not at all, thank you, thanks Ex. 2. Translate the following scntcnccs into English. Let your fellow students respond to them. Use expressions from exercise 1. 1. Извините, я опоздал. 2. Просто, что я не закончил перевод, меня зовут в лабораторию. 3. Спасибо, что ты помог мне. 4. Извини, я еще не знаю, что буду делать завтра. 5. Спасибо за книгу. Я прочел ее за 2 дня. Она очень интересная. 6 . Жаль, но по химии я получил только «3». 7. Тебе нравится математика? 8 . 0 чем говорил преподаватель на прошлом занятии? Ex. 3. Make up sentences or short stories with the following words: 1 ) be, Priestley, scientist, amateur, English; 2) pharmacist, work, Swedish, Schccic, independently, obtain, gas, oxygen, know, wc; 3) they, gas, role, combustion, find, play, cvidcncc, important; 4) French, Lavoisier, modem, combustion, chemist, establish, theory; S) free oxygen, second, state, occur, most, component, atmosphere, abundant; 6 ) generally, obtain, liquid, oxygen, commercially, air, distillation; 7) way, oxygen, be, another, obtain, water, electrolysis 31 1. In what way did Priestley and Schccic obtain oxygen? 2. What is the modem conccpt of combustion? 3. What is the role o f oxygen in combustion? 4. Who established this conccpt first? 5. Is oxygen an abundant clement? Give some examples. 6 . What arc the physical properties of oxygen? 7. What ways of preparing oxygen in the laboratory do you know? 8 . How is oxygen made commercially? Ex. 5. Discuss the following topics: 1. Physical Properties of Oxygen. 2. Chcmical Properties of Oxygen. 3. Preparation of Oxygen. 4. The History of the Discovery of Oxygen. DO YOU KNOW THAT... The phlogiston theory of combustion was still prevalent in Russia in the middle o f the eighteenth ccntury. It came into conflict with the corpuscular theory put forward by Lomonosov. His experiments on the calcination of metals helped Lomonosov to find evidence against it and led him to the discovery of the main law of chcmistry — the law of conservation of mass and energy. Ex. 4. Give detailed answers to the following questions: жүктеу/скачать 5,96 Mb. Достарыңызбен бөлісу:
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