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Вариант 1.

1. A group of journalists and photographers was waiting for the icebreaker to arrive.

2. Careful measurements show the increases to be equal between each consecutive pair of flashes.

3. The piece to be machined is held on the work table which may be adjusted to any convenient height for the job.

4. Cars with built-in electronic devices are very popular now.

5. As the operation of an integrated circuit depends on microscopic “components’, the purity of all materials and the cleanness at the plant they are produced at must be of the highest quality.

6. Bell was making his experiment in a room next to the room Watson worked in.

7. It is evident that the weight moves with increasing velocity and careful measurements show the rate of increase to be constant.

8. When we speak about a further development of computers we mean not only quantity, but also high technology and high speed.

Вариант 2.

1. Current transformers are used when the current to be measured exceeds 100 amperes.

2. People present at the World Fair in New York were interested in the new invention.

3. The revised city budget includes the railway bridge reconstruction.

4. The result to be expected from the experiment will give a definite answer to this question.

5. The operation of integrated circuits depends on their microscopic component.

6. The cutting speed depends on the material to be machined.

7. The first television black-and-white pictures produced a sensation in 1939.

8. Some general engineering subjects difficult for the first-year students are necessary for studying specialized subjects.

Вариант 3.

1. He was the first to apply the new method of work.

2. The design of a mechanism depends on the work to be done.

3. In factories and plants we are surrounded with electronically controlled machines and instruments.

4. The white marble James Adams Memorial Building opened in 1980 more than doubled the Library’s available Capitol Hill space.

5. Hand riveting of steel rivets is more costly and there is a greater liability for the rivets to be overheated and spoiled.

6. This method of voltage control was the first to be used in connection with synchronous converter.

7. Galileo was the first to observe sun spots with his Optic Tube in 1609.

8. The problems to be discussed at the conference are connected with future cosmic flights.

Вариант 4.

1. One must know beforehand whether sufficient current will flow through the circuit to perform the work to be done.

2. Sрасе flight report was presented at the conference.

3. Complex system of radio transmission networks have been set up throughout the world.

4. The substance to be tested must be wet or in a solution.

5. Computers of different types and sizes have appeared in every country of the world.

6. In all the methods of arc welding, an electric arc is struck between an electrode and the parts to be welded.

7. А machine building plant production plan discussion will take place tomorrow.

8. Materials necessary at present to produce supercomputers are difficult to make.