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Будда Шакьямуни был первым человеком в нашу эпоху, показавший людям путь к счастью
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Автор:
conductorfutp - 6 лет назад
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река - Это большой поток воды который течет в разработанном им русле в строении реки имеются морфологические элементы определите по рисунку элементы строения реки
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Автор:
eduvigisgordon - 6 лет назад
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Спишите предложения, найдите и подчеркните дополнения. Я обидел товарища. Я ударил собаку. Я нагрубил сестре. Все ушли от меня. Я остался один и горько заплакал. - Кто наказал его? - спросила соседка. - Он сам себя наказал, ответила мама.
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Предмет:
Русский язык -
Автор:
chayahendricks - 6 лет назад
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- Помогите! Как меняются физические свойства галогена?(сверху вниз)
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Помогите перевести.
Some people argue that elevators began as simple rope or chain hoists (see traction elevators below). An elevator is essentially a platform that is either pulled or pushed up by a mechanical means. A mounted on a platform within an enclosed space called a shaft or sometimes a "hoistway". In the past, elevator drive mechanisms were powered by steam and water hydraulic pistons or by grooved pulley, commonly called a sheave in the industry. The weight of the car is balanced by a counterweight. Sometimes two elevators are built so that their cars always move synchronously in opposite directions, and are each other's counterweight. The friction between the ropes and the pulley furnishes the traction which give this type of elevator its name. Hydraulic elevators use the principles of hydraulics (in the sense of hydraulic power) to pressurize an above ground or in-ground piston to raise and lower the car (see hydraulic elevators below). Roped hydraulics use a combination of both ropes and hydraulic power to raise and lower cars. Resent innovations include permanent magnet motors, machine room-lees rail mounted gearless machines, and and microprocessor controls. The technology used in new installations depends on a variety of factors. Hydraulic elevators are cheaper, but installing cylinders greater that a certain length becomes impractical for very-high lift hoistways. For buildings of much over seven floors, traction elevators must be employed instead. Hydraulic elevators are usually slower that traction elevators. Elevators are a candidate for mass customisation. There are economies to be made from mass production of the components, but each building comes with its own requirements like different number of floors, dimensions of the well and usage patterns.-
Предмет:
Английский язык -
Автор:
hugo3qsz - 6 лет назад
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