Carpathian mountains [ ], Europe [ ]; Rumania [ ]; Austria [ ]; France [ ]; Italy [ ].
acetylene
butane
carbon
chlorine
ethane
hexane
hydrogen
methane ,
octane
propane
pentane
per cent
3. :
accumulate
approximately ,
boiling point
borehole
consist of
decomposition ,
deposit ,
distinct ,
derivative
extraction ,
fuel ,
inflammable ,
limestone
liquid
natural gas
network
occur
obtain
pressure
porous bed
rush .
source
sandstone
volume
4. :
1) occur 1) 2) deposit 2)
3) animal and vegetable remains 3)
4) source 4) ,
5) penetrate 5)
6) under great pressure 6)
7) borehole 7)
8) inflammable 8)
9) liquid and solid fuels 9)
10) extraction 10)
5. :
animal and vegetable remains; under great pressure; several boreholes; network of pipelines; low boiling point; 85 per cent; distinct odour; a great amount of heat; numerous new sources; to obtain new materials; over a period of many centuries; over long distances; inflammable gas.
6. - :
natural deposit, separate deposit, porous beds, long distance, gigantic network, typical natural gas, gaseous fuel, raw material, chemical technologist, extraction of oil, reserves of natural gas.
7. , -, :
pore-porosity-porous; collect-collection-collective; approximate-approximately-approximation; chemist-chemistry-chemical; gas-gaseous-gasify-gasification; derive-derivative-derivable; extract-extraction-extractive; utilize-utilization; numerous-numerously; intense-intensification-intensify-intensity-intensive; penetrate-penetration.
8. volume (volume ; ).
1.Our university has a library of many volumes of Russian and foreign scientific books and journals. 2. A great volume of gas penetrates into porous beds of sand, sandstone and limestone. 3. As is known, for volume of chemical production this plant is one of the leading ones in our country.
9. . , :
a few
few
a little
little
1. We have little information of this discovery. 2. We must add a little water to make this substance melt. 3. Scientists opened a few new sources of gas in Europe.
4. There are few uses of natural gas in industry. 5. A few years ago we utilized this device in our laboratory. 6. As I had little time I could not get reliable information about this deposit of gas. 7. Little of natural gas we may use chemically. 8. Butane, pentane, hexane, and a few other gases may also be present.