Данные предложения переведите на русский язык. 1. Copper extraction techniques refer to the methods for obtaining copper from its ores

1. Copper extraction techniques refer to the methods for obtaining copper from its ores.

2. After spending over $30 million on the project, the company has decided to discontinue its development activities in Russia.

3. The pulverized ore is separated by physical processes like hydraulic washing, froth-floatation, and magnetic separation or by chemical processes, depending on the nature of the ore and its impurities.

4. Further cooling will go more slowly.

5. There are so many historical episodes involving the Orloff.

6. The engines power hydraulic pumps, which generate very high pressure oil for driving the track motors and moving the excavator rams.

7. According to the basic definition, mining means extracting minerals from the earth.

8. Drilling and blasting is employed to remove the worthless overburden.

2) Переведите следующие предложения на русский язык, обращая внимание на союзы и на бессоюзную связь:

1. The geological record shows that after the cataclysm the world was dominated by oceans.

2. When mineral rains of different density are moved by flowing water, the less dense grains will be most rapidly moved, and a separation of high density grains can be effected.

3. The higher the silica content, the more viscous a magma and the more slowly segregation can proceed.

4. It was interesting to see the value of gemstones depends on a lot of things.

3) Переведите следующие предложения на русский язык, обращая внимание на согласование времен:

1. John said that it was difficult to study geochemistry.

2. He asked if the history of life on Earth had begun form the asteroids.

3. He thinks that they are taking their examination in Geology now.

4. He thought that they were taking their examination in Geology at that moment.

5. The teacher informed that in ancient Egypt, gold had been considered the skin or flesh of the gods, particularly the Egyptian sun god Ra.

4) Вставьте глагол в нужной форме. Предложенияпереведите:

1. Only approximately 142,000 tons of gold (to mine) throughout history.

2. Venice (to introduce) the gold ducat in 1284 and it (to become) the most popular gold coin in the world for the next 500 years.

3. The USA’s environmental agencies recently (to place) increasing pressure on mining and exploration companies.

4. Mining companies (to blame for) releasing excessive amounts of pollutants into the air and water which has caused considerable public response.

5. Tin and lead still (to mine) from deep mines located in England, Scotland and Wales.

5) Выберите предложения с синтаксическими комплексами: