Автор статьи
Валерия
Эксперт по сдаче вступительных испытаний в ВУЗах
- industrial, 2. extraction, 3. significant, 4. researcher, 5. conglomerate, 6. relative, 7. lithosphere, 8. investment.
- Hydrothermal mineral deposits are neither common, nor very large compared to other geological features.
- Mineral deposits have been found both in rocks that lie beneath the oceans and in rocks that form the continents.
- Neither of them is a mining engineer.
- In a few cases, silicate minerals are used as ore minerals because the metals either do not form more desirable minerals or form desirable minerals that rarely occur in large deposits.
- Pegmatites (to have) been discovered in all continents.
- Our understanding of Earth (to have) expanded tremendously in the past 100 years.
- Humans (to have) been on the Earth for a mere 0.004% of the Earth’s history.
- They (to have) a very important conference tomorrow.
- The Earth is a little over 4.5 billion years old.
- Russia is the world’s second largest PGE producer, after South Africa.
- The deepest gold mines are about 4 Km. below the Earth’s surface.
- The most significant mineral producing regions in Russia are located in the Kola Peninsula, the North Caucuses, East Siberia, the Urals and the Russian Far East.
- The first Russian dredge was introduced into mining practice in the Amur region by the Verkhne-Amurskaya company in 1894.
- Anthracite is a hard, shiny, black coal that burns with a blue, smokeless flame.
- The United Kingdom has an estimated 780 million tonnes of proved and probable oil reserves.
- Tin and lead is still being mined from deep mines located in England, Scotland and Wales.
- Impurities must be removed from the ore before the extraction of the metal.
- Certain kinds of mineral can be smelted more readily than others.
- Scientists have to apply different geophysical methods to explore a certain mineral.
- Coal was so abundant in Britain that the supply could be stepped up to meet the rapidly rising demand.
- In future we’ll be able to explain the origin of the Earth.
- Diamonds cannot be formed in the low temperatures and pressures.
- They are to make a lot of experiments and investigations.
- We should have checked the data once more before making the final conclusion.
О сайте
Ссылка на первоисточник:
http://www.rosnou.ru
Поделитесь в соцсетях: