PolinaКэт

28.01.2022 08:07

Английский язык

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Vi. запишите и переведите предложения, обращая внимание на бессоюзные дополнительные и определительные придаточные предложения. 12 1. we were told the experiments with this machinery had been completed successfully. 2. mines and other industrial enterprises pollute the air and water we cannot live without. vii. прочитайте текст и постарайтесь понять его содержание. перепишите и письменно переведите части 2, 4 и 5. mining 1. mining is the extraction of valuable minerals or other geological materials from the earth, from an orebody, lode, vein, (coal) seam or reef, which forms the mineralized horizon and package of economic interest to the miner. 2. to gain access to the mineralised package within the lease area it is often necessary to mine through or remove to the side waste material which is not of immediate interest to the miner. the total movement of ore and waste, which also includes the removal of soil in some cases, is referred to as the mining process. depending on the nature, attitude, and grade of the orebody, it is often the case that more waste than ore is mined during the course of the life of a mine. the waste removal and placement is a major cost to the mining operator and to facilitate detailed planning the detailed geological and mineralisation characterization of the waste material forms an essential part of the geological exploration programme. 3. the waste is classified as either sterile or mineralised and the movement and stacking (or dumping) of this material forms a major part of the mine planning process. in cases where the mineralised package is determined by an economic cut-off, the near grade mineralised waste is dumped separately with view to treatment should market conditions change and it becomes economic viable to treat this material. 4. civil engineering design parameters are used in the design of the waste dumps, and special conditions apply to high-rainfall areas, e.g. brazil or venezuela, or where the dumps are created in seismically active areas like chile, peru, and parts of canada. in addition, the waste dump designs must meet with all regulatory requirements of the country in whose jurisdiction the mine is located. 13 it is also common practice for major mining companies to do the rehabilitation of the dumps to an international acceptable standard, which in some cases means that higher standards than the local regulatory standard are applied. 5. the materials of economic interest recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock salt and potash. mining is required to obtain any material that cannot be grown through agricultural processes, or created artificially in a laboratory or factory. mining in a wider sense comprises extraction of any non-renewable resource. viii. просмотрите 1-й абзац текста и ответьте на вопрос: what forms the mineralized horizon? запишите и переведите вопрос и ответ.