I. Определите функцию инфинитива в следующих предложениях и переведите их:

А

1. To assign a numerical value to the inertia of any given body, we choose as a standard some body whose inertia is arbitrary taken as unity. 2. Each organ of the living organism has its own work to do. 3. When cells which have similar functions become congregated together to form distinct anatomical structures, we call such structures organs. 4. Oxygen is extremely hard to liberate from a compound. 5. The disintegration of radioactive substances is known to be a spontaneous process. 6. We know the electric cell to consist of two plates of conducting material assembled together and immersed in an electrolyte. 7. Atomic energy is likely to become the main source of power-supply in the years to come. 8. Dilute solutions appear to obey laws exactly analogous to the laws of gases. 9. The difficulties to overcome in the manufacture of synthetic camphor seem to be great. 10. There was a time when lightning proved to be a dangerous problem to be solved. 11. Devices for changing a.c. into d.c. are needed to charge storage batteries. 12. The weather is unlikely to change for the better in the coming days. 13. I asked him to inform me about the results of the test.

B

1. If the field winding is in series with the armature, all of the current to be generated must pass though it. 2. With a small current there must be a greater number of turns of wire on the field magnets to produce a magnetic field of adequate strength. 3. Water to make up for evaporation and to aid in digestion is a most necessary part of our food. 4. Many substances unite with water to give compounds which are called hydrates. 5. An active element is very difficult to liberate from a compound. 6. A video-amplifier is expected to cover a very wide range of frequencies. 7. Temperature changes up to 200 C appear to have no effect on this substance. 8. The study of electricity seems to have begun about 1600 when the first book on experiments in electricity appeared. 9. We know the sun to be intensely hot. 10. It is unlikely for the oxygen to be easily liberated from this substance under such a temperature. 11. We know the storage batteries to contain chemicals generating electric current under certain conditions.

C

1. The Chinese appear to have been the first to use pieces of lodestones as compasses. 2. When two elementary substances combine, the process involves the union of the two kinds of atoms to form compound molecules. 3. The radio signal is too weak to be detected at this distance. 4. When the wire is connected in such a manner that the current can flow through it, the circuit is said to be closed. 5. We know all bodies to consist of atoms. 6. To tear away from the liquid the molecule which leaves it is to have a large amount of kinetic energy. 7. A non-ionized clean air is considered to be good insulator. 8. An important problem which is to be considered with regard to any engine is the question of its efficiency. 9. When iron and water are heated in a closed vessel, the hydrogen and the oxide of iron which are produced react with one another to give back water and iron. 10. The next step to be taken in this process involves the treatment of camphor with acetic acid. 11. This problem has to be solved as soon as possible. 12. Nakhirnov is known to have been one of the most talented Russian admirals. 13. Gallileo carried out a special experiment to prove that heavy objects fall not faster than light ones.