Page 97 - The phenomenal demographic and technological changes in the 21st century

ГРАМАТИЧНІ ВПРАВИ

1. Визначте форми і функції герундія. Перекладіть речення

українською:

1. Fuel delivering may be performed in rail tank cars, tank trucks, barrels and

cans.

2. Some oil products require special means of transportation while being

delivered by railway.

3. Oil products pumping is usually carried out by pumping stations and plants.

4. The most desirable characteristic of a propellant is its retaining stability at

elevated temperature.

5. Purifying is very important in the production of high-quality lubricants.

6. We know furnaces being used for the production of high - quality gasolines.

7. Pipelines are the most efficient means of transporting the ever-increasing

quantities of bulk petroleum required in modern warfare.

8. While one tank is being filled with fuel, the fuel in another one is allowed to

stop seethe before being tested for quality and cleared for issue.

9. Power for aerial propulsion is known to be produced by using the oxygen of

atmospheric air as a chemical reactant in combustion with some fuel, e.g. a

hydrocarbon such as gasoline or kerosene.

10. There appear many problems of utilizing atomic energy.

11. Jet airplanes have been designed so that they are capable of being fueled at the

rate of one or two thousand gallons per minute from four hoses through

underwing pressure - fueling points.

12. Tsiolkovsky began thinking seriously about the design of a spacecraft in 1895.

13. A gasoline engine performs its work by burning a mixture of gasoline vapour

and air inside a cylinder which is a part of the engine.

14. The government is also concerned to limit the operation of giant tankers,

being afraid of pollution.

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