_____ is a natural mineral formation containing metals in the industrially useful concentration.: ответ на тест 303660 - Английский язык

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All engineering materials are divided into metals and  non-metals. Copper, cast iron, aluminium are examples of metals. Rubber, plastic and ceramics are examples of non-metals. Today different metals are widely used in machine-building industry.

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All engineering materials are divided into metals and non-metals. Copper, cast iron, aluminium are examples of metals. Rubber, plastic and ceramics are examples of non-metals. Today different metals are widely used in machine-building industry.

_____ is a way of studying of an earth's crust by means of deep chinks.

_____ is an area of significant deposits of coal.

_____ is a science about underground waters and their interaction
with mineral deposits.

_____ is the distance on a vertical from any point on the Earth’s surface to an average level of the ocean.