Прочитайте текст и заполните пропуски подходящими по смыслу словами 1_______ are of great importance...: ответ на тест 223817 - 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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The Karadjere people live in the desert of Western Australia.
They travel by canoe. They do not live in one 1_______. They live in villages; but travel around on foot. They sleep in 2_______ made of dry tree branches, and the roofs are made of palm leaves, their houses are made of 3_______. Several families live in one 4_______.

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We build because we need shelter. We need shelter from sun, rain, wind and snow. Not much that modern people do takes place outdoors. Our activities mostly take place indoors. For these activities we may need air that is warmer or cooler than the air outdoors. We may also need less light by day and more light by night than is provided by nature.
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Why do we build?

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Many of the robots today perform different jobs. Robots are used in various branches of industry. A modern robot is a complex structure with a number of components. Each of them performs a certain task. Scientists have developed new models of robots. Such robots are used for various purposes.
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What have scientists developed?

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Engineering is putting knowledge of Nature to practical use. The end result of engineering is some physical thing: a machine, a tool, a gadget. Engineering is solving problems. It’s convenient to discuss engineering projects within the framework of five steps for solving problems: define the problem, identify possible solutions, select a solution, implement the solution, verify the solution.
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What is the end result of engineering?