Вопрос № 912004 - Английский язык

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The Great Wall of China was built across northern China to protect the population. 1___________. The work was done by enormous gangs of forced labourers and many of them died doing the work. The wall is over 2000 km long, 3.5m high, and 4.5m wide at the top.2___________.
3___________. The stone structures were usually tombs for pharaohs. The pyramids have square bases with sloping sides which meet at an apex. The first pyramid was built in about 2600 BC and is over 140m high.4___________. It is estimated that 20-25,000 people worked for 20 years to build each pyramid.

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The Great Wall of China was built across northern China to protect the population.
 1_______. The work was done by enormous gangs of forced labourers and many of them died doing the work. 2___________. It is made of earth covered with stone.
3___________. The stone structures were usually tombs for pharaohs. The pyramids have square bases with sloping sides which meet at an apex. The first pyramid was built in about 2600 BC and is over 140m high. 4___________. It is estimated that 20-25,000 people worked for 20 years to build each pyramid.

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What is the length of the window?
This is a room. It’s rectangular. The height of the room is 3 m. The room is about 4 m wide. It has a length of 8 m. So, the volume of the room is approximately 96 m3. The room is light. It has two wide windows. The length of the window is 2 m and the width is 1 m. Thus, the area of the window is 2 m2.

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What is the major purpose of cladding?
Cladding is a material used as the exterior wall enclosure of a building. The cladding of a building is its most visible part. Its major purpose is to separate the indoor environment of a building from the outdoors.
Cladding must prevent the entry of water, snow and ice into a building. Water on the face of a building is known to be driven by wind not only in a downward direction, but in every other direction, even upward.
Water problems, that is keeping water out, are especially great on very tall buildings. These buildings rise to height where wind velocities are extremely high.
They are much higher than a ground level. It should be taken into account that on tall buildings water tends to penetrate the smallest crack or hole and enter the building.

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In the first half of the nineteenth century cast iron and wrought iron were introduced and used for industrial construction in Europe and North America. Steel was not widely used, being considered a rare and expensive building material. Inexpensive steel first began to be produced and used only with the invention of the Bessemer process, in the 1850s. From that period on, metal started to be used as rather popular and useful building material. The famous Eiffel Tower of Paris was constructed of wrought iron in 1889. By that period several steel frame skyscrapers had already been built in the United States. That was the beginning of the new era; a new highly useful and popular construction material had been born and introduced into building industry.

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Concrete is produced by combining coarse and fine aggregates, Portland cement, and water. Coarse aggregate is generally gravel or crushed stone, and fine aggregate is sand. Cement, sand, gravel and water are taken in proportional amounts and mixed. The quality of concrete depends mostly on the quality of the cement used. The process of production consists in pouring the mixed components into forms and holding them there until they harden. The process of hardening generally lasts for about 28 days.