4. Перекладіть на українську мову речення із суб’єктним інфінітивним зворотом.

1. Substances are said to be warm, hot, cool, or cold as regards to their temperatures.

2. This substance was believed to produce better temperature conditions.

3. Lomonosov's ideas of heat and cold appeared to be a great discovery of the 19-th century.

4. The introduction of inert gases is considered to have enabled a progress of commercial refrigerators.

5. The capacity of an absorbtion machine was assumed to be governed by the weight of a refrigerant

6. The experimental data on a mixture of those freons proved to have been much better than other components.

7. The machine seems to perform all the calculations with great speed.

8. The results obtained are considered to be satisfactory.

9. The new device is reported to have been put into mass production.

10. The capacity of this device proves to be increasing by and by from its starting.

11. These experiments are likely to have been made in suitable conditions.

12. The application of this device is unlikely to give better results.

13. This chemical changes appear to have been caused by health.

14. These laser beam seems to have almost unlimited industrial possibilities

15. The neutrons and protons of an atom are known to be linked together to form a compact nucleus.

16. Digital computers are likely to be wider used than logic ones.

17. Plastics are supported to be used instead of metals in many cases.

18. A wide introduction of computers and robots is said to cause unemployment.

19. English is known to be a language of international communication.

20. Certain properties of matter are considered to be always the same under definite conditions.

21. Absorption refrigerating system is known to be applied to present day air-conditioning.

22. Mechanical refrigeration is known to have been used at first only for the production of artificial ice.

23. Designers of refrigeration equipment are expected to be experimenting with the multicomponent mixtures of refrigerants.

5. Розподіліть речення на дві групи:

а) з суб’єктним інфінітивним зворотом

б) з об’єктним інфінітивним зворотом

Вкажіть на час та стан інфінітиву.

Перекладіть речення на українську мову.

1. We know such plants to be called heat pumps.

2. Convection is known to be one of three possible ways to transfer heat from one part of a substance to another part.

3. They believe the application of artificial cold to have transformed the quality of our life.

4. Nowadays the low temperature research seems to be speeding up the introduction of mechanical refrigeration into many different fields of technology.

5. Such machines are said to have been constructed by Europeans by the end of the last century.

6. We heard their invention to have played a significant role in the history of refrigeration.

7. In Lomonosov's time heat was considered to be a substance which was neither created nor destroyed.

8. Lomonosov is known to have rejected the existing 'caloric' theory of heat.

9. The designers of refrigerating machines considered ammonia to be the most suitable refrigerant.

10. The refrigerant is supposed to be a substance to be evaporated rapidly at low pressures.

11. He watched the ice to be melting.

12. Ice and ice-salt refrigeration is said to have played an important role in food industry.

13. The expansion of a compressed gas is known to cause refrigeration.

14. Such solution were supposed to produce low temperatures necessary for cooling.

15. They heard artificial ice to be a major source of cooling until the 2-nd decade of the 20-th century.

16. We know preservation of food products by means of cold storage to remain an actual problem of nowadays.

17. All matter is believed to be made up of particles called molecules.

18. Molecules are known to be in constant motion.

19. We know the process of cooling to be connected with the transference of heat.

20. By such an action a machine makes the compressed gas to expand.

21. Mechanical refrigeration proved to have bettered cold storage of foods.