V. Переведите письменно абзацы 2 – 3 текста.

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2.Основными элементами телекоммуникационной системы являются: передатчик, который принимает информацию и преобразует ее в сигнал для передачи; среда распространения, по которой передается сигнал; приемник, который принимает и преобразует сигнал обратно в пригодную для использования информацию.

Рассмотрим, например, радиовещание. В этом случае вещательная вышка - это передатчик, радио - это приемник, и среда распространения –это свободное пространство. Часто телекоммуникационные системы являются двухсторонними и устройства работают как передатчик и приемник или приемопередатчик. Например, мобильный телефон является приемопередатчиком. Телекоммуникация по телефоннной линии называется прямой связью, потому что она осуществляется межу одним передатчиком и одним приемником, телекоммуникацию посредством радиовещания называют рассеянной связью, потому что она между одним мощным передатчиком и многочисленными приемниками.

3.Сигналы могут быть аналоговыми или цифровыми. В аналоговом сигнале, сигнал изменяется непрерывно по отношению к информации. В цифровом сигнале, информация кодируется в виде набора дискретных значений.

Совокупность передатчиков, приемников и приемопередатчиков, которые связаны между собой называется сетью. Цифровые сети могут состоять из одного или нескольких маршрутизаторов, которые устанавливают маршрут для данных к нужному пользователю. Аналоговые сети могут состоять из одного или нескольких коммутаторов, которые устанавливают связь между двумя или более пользователями. Для обоих типов сети, ретранслятор может быть необходим для усиления или воссоздания сигнала, когда он передается на большие расстояния.

Дополнительные задания

Задание 1

Open the brackets. Put the verbs into the Past Indefinite.

1. The pupils (to run) a race at the stadium last week.

2. Their family (to go) to the seaside month ago.

3. Margaret (to do) the shopping yesterday day evening.

4. They (to listen) to music at the concert hall yesterday.

5. My father ( to smoke) a cigarette f minute ago.

6. Fred and Helen (to stay) at a hotel last June.

7. Bat (to water) the flowers an hour ago.

1.ran 2.went 3.did 4.listened 5.smoked 6.stayed 7. watered

Задание 2

Open the brackets. Put the verbs into the Past Indefinite.

1. You (to go) to the theatre last week.

2. Al (to buy) black shoes three days ago.

3. I (to give) a call to Sam five minutes ago.

4. Alice (to knit) a warm sweater last month.

5. He (to got) off the train a minute ago.

6. They (to watch) squirrels in the park last Sunday.

7. We (to arrive) in Moscow yesterday evening.

1.went 2. bought 3.gave 4.knited 5.goted 6.watched 7.arrived

Задание 3

Complete the sentences using the items in brackets in the right order.

1. Jane spoke (at the meeting, last Wednesday, firmly).

Jane spoke firmly at the meeting last Wednesday.

2. The player caught the football (at the stadium, quickly).

The player caught the football quickly at the stadium.

3.The fans cheered their favorite team (yesterday, wildly, at the gym).

The fans cheered their favorite team wildly at the gym yesterday.

4. The director spoke (at the rehearsal, on Monday, excitedly).

The director spoke excitedly at the rehearsal on Monday.

5. Bob threw the ball (in the hall, then, high).

Bob threw the ball high than in the hall.

Задание 4

Put the prepositions for, on, in, at, by, about, of where necessary.

1. Excuse me, what are you queuing …?

2. As we have very little time, let's concentrate … our business.

3. How are you feeling … your new surroundings?

4. 1998 was the year when Charles enrolled… London University.

5. Sorry, but I can't make Sue join in the game … force.

6. Would you like to enroll … a French course?

7. It's very impolite to jump … queues.

1. for 2. on 3. in 4. at 5. by 6. At 7. about

Задание 5

Say the same in different way using: to see around, to see through, to see to, to see off.

1. Don't worry, I'll take care of your garden in summer.

2. We all came to the airport to say goodbye to our friend.

3. I'm sure that I'll be meeting you quite often now that the school year has begun.

4. I'm very surprised that he didn't understand at once that his little sister was lying to him.

5. When are you leaving? I'll come to say goodbye to you.

1. Don't worry, I'll see to your garden in summer.

2. We all came to the airport see to our friend off.

3. I'm sure that I'll see you around quite often now that the school year has begun.

4. I'm very surprised that he didn't see through at once that his little sister was lying to him.

5. When are you leaving? I'll come tosee you off.

Задание 6 Open the brackets. Put the verbs into the Present Indefinite, the Present Continuous or the Past Indefinite.

I (to want) to tell you about a clever boy. His name (to be) George. He (to be) from Germany. George (to be) fifteen. He (to be) a good pupil. George (to be) good at maths. He (to want) to be a scientist. George (not to go) in for sports. He (not to like) to go for a walk. But George (to like) to study maths. Yesterday George and his mother (to go) to the theatre.Now George (to do) his homework. And his (to knit).

I want to tell you about a clever boy. His name is George. He is from Germany. George is fifteen. He is a good pupil. George is good at maths. He wants to be a scientist. George doesen^'t go in for sports. He doesen't like to go for a walk. But George likes to study maths. Yesterday George and his mother went to the theatre. Now George is doing his homework. And his is kniting.

Задание 7

Past Indefinite. Make up questions from the words.

1. eat, so, many, he, sweets, why, yesterday, did?

2. they, from, did, come, Spain, when?

3. opened, who, yesterday, the windows, evening?

4. Last time, Willy, when, repair, did, his car?

1. Why did he eat so many sweets yesterday?

2. When did they come from Spain?

3. Who opened the windows yesterday evening?

4. When did Willy repair his car last time?

Задание 8

Past Indefinite. Fill in the blanks with «who», «what», «where», «why», «when», «with whom».

1. … did Carol buy her new fur coat?

2. … didn't he buy her a present yesterday?

3. … did you look for a ball yesterday evening?

4. … did she go to Greece last month?

5. … did his sister teach last month?

6. … did they laugh at Colin yesterday?

7. … did your cousin spend his last weekend?

1. Where did Carol buy her new fur coat?

2. Why didn't he buy her a present yesterday?

3. Where did you look for a ball yesterday evening?

4. With whom did she go to Greece last month?

5. Why did his sister teach last month?

6. Why did they laugh at Colin yesterday?

7. Where did your cousin spend his last weekend?

Задание 9

Choose the correct item:

1. He … the bed yesterday morning.

isn't making, doesen't make, didn't make

2. Ten and Jake … at hotel during their last summer holidays.

don't stay, aren't staying, didn't stay

3. John … the yesterday evening.

doesen't clean, didn't clean, isn't clean

Задание 10

Put the phrases in the right order to make the talk logical.

A) Thank you, sir.

B) Could you tell me the way to the railway station?

C) Yes. The station is on your right next to the big roundabout.

D) What do you want to know?

E) Oh! You've taken the wrong turning. You need to go back the way you've come as far as the main road, turn left, and go straight ahead for two miles.

F) Excuse me, sir, could you help me?

G) For two miles?

1. – F; 2. – D; 3. – B; 4. – E; 5. – G; 6. – C; 7. - A

Задание 11

Express the same in Russian.

1. I'm not going anywhere in the near future. I've got some work to do here.

Я не собираюсь уходить в ближайшем будущем. У меня есть еще работа здесь.

2. The road won't be repaired soon. The workers are taking their time.

Дорогу не отремонтируют в ближайшее время. Рабочим потребуется еще время.

3. The twins are so much alike that even their parents can't tell the difference.

Близнецы так похожи, что даже собственные родители не могут найти отличия.

4. Ron boasts that he has never done anything against his will in his whole life.

Рон гордится, что никогда в своей жизни не делал ничего против своей воли.

5. The lecturer went on speaking paying attention to the noise.

Лектор продолжил разговаривать не обращая внимание на шум.

Задание 12

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