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1. то solve the problems of environment protection we must create ecological data banks with the state and local authorities and businessmen’s support.
2. experiments allowed him to discover the properties of new chemical elements.
3. to prevent water entering the cavity of the wall, moisture barriers are used on the external surface and vapour barriers are used on the internal face.
4. sound-deadening material is used to reduce sound passing from one room to another.
5. peat is considered to be the lowest grade of coal because of its high water content.
6. my job is to make holes in rocks so that the samples of the rock can be taken and to insert explosives for blasting.
8. to check whether there is any oil at a site an exploratory well, or wild cat id to be dug.
9. cracking process uses heat, pressure and catalysts to break up large molecules of heavy hydrocarbons into small molecules of light hydrocarbons.
10. collectors are special devices to remove solids from the gas.
11. it also allows the rover to go over high rocks.
12. to prevent a car from moving pull a parking brake.
13. i’m pleased to report that our synthetic motor oils provide extremely fast lubrication of moving parts.
14. incineration isn’t the safest way to utilize plastics.
15. cables consisting of several copper wires each with a shield are known as twisted pair cables.
16. to send out information is to transmit.
17. nuclear power plants began to be commissioned from mid-fifties.
18. the high voltage electricity transmission network was created in order to transport electricity over long distances from big power plants.

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