Добавил:
Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
978-5-06-005823-9.docx
Скачиваний:
7
Добавлен:
28.02.2024
Размер:
5.11 Mб
Скачать

3. Complete these sentences, using the correct variant:

1. Amplifiers in use nowadays

a) include only one stage.

b) include several stages.

2. A three-stage amplifier uses

a) three triodes connected in parallel.

b) three triodes connected in series.

3. The grid of each tube is insulated

a) by means of a coil.

b) by means of a capacitor.

4. The voltage variation is transferred

a) through a tube.

b) through a capacitor.

5. The circuit uses

a) a different grid bias.

b) a common grid bias.

4. Answer the following questions:

1. How many stages do amplifiers include?

2. What are the main parts of a three-stage amplifier?

3. By what means are the grids of the tubes insulated?

4. What type of grid bias is employed?

5. In what way is the voltage variation transferred?

Unit Twenty-Two [22]

1. A) Cover the right column and read the English words. Translate them into Russian and check your translation.

b) Cover the left column and translate the Russian words back into English.

spring

пружина

cross-section

поперечное сечение

to close

[klouz]

замыкать, закрывать

close to

[ˈklous tə]

близко к (от)

to move

двигаться), приводить в движение

to switch on

включать

to switch off

выключать

various

[ˈvɛərɪəs]

различный, разнообразный

2. Read the words and put down their Russian equivalents. Then translate them back into English (orally).

[rɪˈleɪ]

relay

___________________________

[ɪˌlektrouˈmæɡnɪt]

electromagnet

___________________________

[ˈɑːmətʃə]

armature

___________________________

[ˈkɔntækt]

contact

___________________________

[ˈsɪstɪm]

system

___________________________

[ˌɔːtəˈmætɪk]

automatic

___________________________

[ˈpænl]

panel

___________________________

3. Change the adjectives into adverbs by adding -ly. Put down their Russian equivalents.

Model: automatic  automatically

wide 

______________________________________

economical 

______________________________________

unprogressive 

______________________________________

unnecessary 

______________________________________

uneconomical 

______________________________________

Соседние файлы в предмете Английский язык