Прочитайте текст и заполните пропуски подходящими по смыслу словами 1_______ are of great importance...: ответ на тест 439317 - Английский язык

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1_______ are of great importance in instruments that use 2_______. 3_______ devices such as cameras, microscopes, projectors and telescopes all produce images with lenses, while many of us 4_______ the world through lenses that correct imperfect vision.

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1_______ are of great importance in instruments that use 2_______. 3_______ devices such as cameras, microscopes, projectors and telescopes all produce images with lenses, while many of us 4_______ the world through lenses that correct imperfect vision.

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This is going to be your 1_______. It isn’t finished yet. Look at the 2_______ and decide what the 3_______ rooms are going to be and how you are going to finish them. Include some or all of the following: kitchen, bathroom(s), toilet(s), bedrooms, living room, dining room, study, playroom, and any other rooms that you want. If you haven’t dot enough rooms, put on another 4_______.

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The Empire State Building was build in 1931 in the United States of America. Its construction took about two years. The exterior of the sky-scraper is supported by a framework produced of steel. It should be noted that 60,000 tons of steel were used for its production. The Empire State Building is considered to be one of the tallest and spacious constructions of the world. It can be attended by 80,000 people simultaneously.
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How much time did the construction of the Empire State Building take?

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The quality of concrete is known to depend on the properties of materials it consists of. The amount of constructing materials is also of great importance. Among the kinds of concrete used in modern construction there are plain concrete and reinforced, or ferro-concrete. The usage of plain concrete is practically limitless. As to ferro-concrete, it is mostly used for construction of foundations, columns, girders and beams. This kind of concrete is also rather popular for constructing bridges, dams and dock walls.
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The usage of what construction material is practically limitless?

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There are some basic types of fuel for motor vehicles. There is diesel fuel, there is petrol and there is fuel mixture.
A lot of buses have diesel engines but not only a few cars have such engines. There are also a few cars with two-stroke engines but most cars have four-stroke engines.
Most lorries have diesel engines. There are not many lorries with four-stroke petrol engines but there are lorries with two stroke engines.
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What engines do a lot of buses have?