Е. В. Дмитриева
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ЭС (3)
- Бұл бет үшін навигация:
- Упражнение 5.
- Упражнение 6.
- Упражнение 7.
- Упражнение 8.
| Упражнение 4.
Ответьте на вопросы, используя слова и словосоче- тания в скобках. 1. What is a laser? (a device producing an intensive beam of light) 2. What is its principle of operation? (light amplification by stimulated emission of radiation) 3. What light is produced by a laser? (light of pure single colour) 4. What can be done by means of a laser? (vaporizing the hardest materials) 5. What materials can be treated with a laser? (practically any material and any substance) 6. What is the most promising use of lasers? (the use in all kinds of communication) 7. What prevents putting into effect the projects to use lasers more widely in space? (great technological difficulties and great cost involved) ● Упражнение 5. Прочитайте и переведите без словаря. То understand why light from the laser is so concentrated, you must know that light travels in waves. Ordinary white light is made up of many wavelengths travelling in every direction. Laser light is essentially of one wavelength, with all the waves moving in one direction. Because the laser wavelengths intensify each other, they can remain in an unbelievably straight beam for a long distance. Almost any substance can be forced to «lase» if you work hard enough with it. Gas lasers give off continuous beams of light. Tiny semiconductor lasers may be especially useful in computers for transmitting signals to replace the use of cables. Many lasers can give off invisible radiation, either infrared or ultraviolet. ● Упражнение 6. Ответьте на вопросы. 1. What is this text about? 2. What does the word «laser» mean? 3. What is the laser, is it a device or some phenomenon? 4. Who was the first to write about lasers? 5. What writer from this country wrote a book about a laser? 6. What can a laser do? 7. Where can it be used? 8. What other uses do you know? ● Упражнение 7. Найдите русские эквиваленты в b) для английских словосочетаний из а): а) before the turn of the century, fantastic story, sword of heat, mysterious sword of heat, has come to reality, the name stands for, light amplification, stimulated emission, mankind's oldest dream, to make lead run like water, technological tool, thermonuclear fuel, to have no time to disintegrate, 57 experiments in heating, required temperature, dozens of times greater, in just a fraction of a second; b) технологическое средство; заставить свинец литься как вода; на- звание означает; старейшая мечта человечества; усиление света; в конце прошлого века; индуцированная эмиссия (излучение); огненный меч; таин- ственный огненный меч; воплотилось в реальность; фантастическая исто- рия; эксперименты по нагреву; требуемая температура; термоядерное топ- ливо; нет времени для распада; в десятки раз больше; всего за долю секунды. ● Упражнение 8. Найдите: а) синонимы: rapidly, sophisticated, to conduct, demand, almost, quickly, to carry out, approximately, opportunity, requirement, also, use, to fulfill, complex, as well, to realize, application, possibility; б) антонимы: further, integrate, cooling, outside, powerless, uncontrolled, limited, disintegrate, nearer, capable, limitless, controlled, incapable, powerful, heating, inside. жүктеу/скачать 1,01 Mb. Достарыңызбен бөлісу:
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