Упр. 5. Выразите несогласие. Используйте наречия времени, данные в скобках. Образец The Baxters usually spend their holidays at the seaside. (Seldom) Are you sure? I think they seldom spend their holidays at the seaside. 1. Mike always comes here. (never) 2. They often go to the theatre. (seldom) 3. Henry sometimes plays golf. (never) 4. Dick usually finishes work at 7. (generally at 6) 5. Harry never invites Peter to his parties. (always) 6. Jack always starts work at 7. (usually at 9) 7. Betty often writes to her parents. (seldom) 8. John always gets to work at 9. (sometimes at 10) 9. Robert often visits his sister. (never) 10. Mr. Sawyer never takes his children to school. (often) Упр.6. Придумайте по одному предложению на каждое новое слово. mass media- средства массовой информации, society- общество, to entertain-развлекать , to influence- влиять, event- событие, view- точка зрения , spare time- свободное время , current events- текущие события , audience- аудитория , advertising- реклама , to own- владеть , satellite- спутник.
Упр.9. ответьте письменно на вопросы по тексту: 1. What is mass media? 2. How does mass media influence people? 3. What is the difference between radio and TV programmes? 4. Does the audience of TV and radio differ? 5. Do you think that advertising is useful?
Текст: MASS MEDIA Mass media (that is the press, the radio and television) play an important role in the life of society. They uniform, educate and entertain people. They also influence the way people look at the events and sometimes make them change their views. Millions of people watch TV and listen to the radio in their spare time. They listen to the radio while driving a car. On the radio one can hear music, plays, news and various discussions of current events. Lots of radio or TV games and films attract large audience. There is a lot of advertising in mass media. Many TV channels, radio stations are owned by different corporations. The owners can advertise whatever they choose. But we cannot say that mass media do not try to raise the cultural level of people or to develop their tastes. Mass media bring to millions of homes not only entertainment and news but also cultural and educational programs. There is a great number of TV channels, cable TV, satellite TV and lots of radio stations now.
1. We had to wait for the doctor for a long time yesterday.
2. They should meet at three p.m.
3. You can talk to her tomorrow.
4. Can I call you next week?
5. Can you help me with this paper tomorrow morning?
6. She must have been studying hard to achieve such good results.
7. May I borrow your umbrella please?
8. He must have gone already, though he may still be waiting.
9. The children could watch TV last night.
10. I have to get up at 6 a.m. My working day begins at 8.
11. In a month she will be able to play the piano again.
Currently, thanks to the introduction of GPS, accurate and inexpensive navigation receivers are widely used. How do these little smart assistants know where you are?
The basic principle underlying the entire GPS system is simple and has long been used for navigation and orientation: if you know exactly the location of a reference point and the distance to it, you can draw a circle (in the 3-dimensional case - a sphere), on which should be the point of your position. In practice, if the above distance, i.e. radius is large enough, you can replace the arc of a circle with a straight line segment. If you draw several of these lines corresponding to different reference points, then the point of their intersection will indicate your location. In GPS, the role of such benchmarks is played by two dozen satellites, each moving in its own orbit at an altitude of about 17,000 km above the surface of the Earth. The speed of their movement is very high, but the parameters of the orbit and their current location with high accuracy are known to on-board computers.
An important part of any GPS navigator is a regular radio receiver operating at a fixed frequency and constantly “listening” to the signals transmitted by these satellites. Each of the satellites constantly emits a radio signal, which contains data on the parameters of its orbit, the state of the onboard equipment and the exact time. Of all this information, the exact flight time data is the most important: the GPS receiver, using the integrated processor, calculates the time interval between sending and receiving the signal, then multiplies it by the speed of propagation of radio waves, etc. recognizes the distance between the satellite and the receiver. The result of subsequent calculations are the coordinates of your location.
Объяснение:
В настоящее время благодаря внедрению системы GPS получили широкое распространение точные и недорогие навигационные приемники. Каким же образом эти маленькие "умные" узнают, где Вы находитесь?
Основной принцип, лежащий в основе всей системы GPS, прост и давно используется для навигации и ориентирования: если Вы точно знаете местоположение какого-либо реперного ориентира и расстояние до него, то можно начертить окружность (в 3-х мерном случае - сферу), на которой должна быть расположена точка Вашего положения. На практике, если вышеуказанное расстояние, т.е. радиус, достаточно велик, то можно заменить дугу окружности отрезком прямой линии. Если провести несколько таких линий, соответствующих разным реперным ориентирам, то точка их пересечения укажет Ваше местоположение. В GPS роль таких реперов играют две дюжины спутников, движущихся каждый по своей орбите на высоте около 17 000 км над поверхностью Земли. Скорость их движения весьма велика, однако параметры орбиты и их текущее местонахождение с высокой точностью известны бортовым компьютерам.
Важной частью любого GPS-навигатора является обычный радиоприемник, работающий на фиксированной частоте и постоянно "прослушивающий" сигналы, передаваемые этими спутниками. Каждый из спутников постоянно излучает радиосигнал, в котором содержатся данные о параметрах его орбиты, состоянии бортового оборудования и о точном времени. Изо всей этой информации данные о точном бортовом времени являются наиболее важными: GPS-приемник с встроенного процессора вычисляет промежуток времени между посылкой и получением сигнала, затем умножает его на скорость распространения радиоволн и т.о. узнает расстояние между спутником и приемником. Результатом последующих вычислений являются координаты Вашего местоположения.