Прочитайте текст и заполните пропуски подходящими по смыслу словами. Wood belongs to naturally growi...: ответ на тест 912000 - Английский язык

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Wood belongs to naturally growing materials. It is known to be the oldest construction material and is still widely used for different purposes. Wood is popular since it has low weight and is easy to work. Besides, it grows naturally and is cheap. But its usage is limited because of its disadvantages: it easily burns and decays. As to stone, it also belongs to the oldest building materials. Among its disadvantages there are strength, high heat insulation and fire-resistance.

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Being the oldest building material, wood is also known to be the only naturally growing organic material. 1_______? Hardly so, because wood always contains some water which decreases its strength. 2_______. It is a well-known fact that the drier is the cut wood the greater is its strength and hardness.
Trees are known to grow naturally, which makes wood a constantly renewable natural resource. 3_______. But, as any other construction material, wood has its disadvantages. The main ones are the following – it is not fire-resistant, it easily burns. 4_______.

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Timber belongs to one of the oldest building materials. It has been from ancient times and is still produced from 1_______ wood. Timber has always been highly usable in construction because of its many advantages. To these belong its strength, light weight, cheapness, and high 2_______. Its other advantage is that it belongs to natural resources and is naturally renewable. It is the more so that about a third of the world is still considered to be covered with forests. Besides, timber is resistant to corrosion produced by 3_______ substances in the modern polluted atmosphere. One more advantage of timber is that it can be used for many construction 4_______.

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When did the first passenger train go through the Channel Tunnel?
The channel tunnel is between Britain and France. It is more than 20 kilometres long. It was built by British and French engineers. They started on opposite sites and met in the middle under the sea. They used specially-designed tunnel boring machines (TBMs) to dig the tunnels through the rock under the seabed. TBMs are enormous machines for digging tunnels. The machines used to dig the main tunnels were about 8.5 metres in diameter and 250 metres long. Work started in 1987 and the teams met under the seabed in 1991. The first passenger train went through in 1994.

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Why do light materials help create a lighter and brighter room?
Floors belong to one of the most important functional components of a building. Floors influence the acoustics of a room: it depends on whether a hard or soft flooring is used. Floors also react in various ways with light. Some flooring materials are known to produce mirrorlike reflection. As to dark flooring materials, they, on the contrary, absorb light and this absorption makes a room darker. As to light materials, they reflect light and help create a lighter and brighter room.

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What was The Great Wall of China made of?
The Great Wall of China was built across northern China to protect the population.
Before the third century BC there were lots of smaller walls and these were joined together to make one long. The work was done by enormous gangs of forced labourers and many of them died doing the work. The wall is over 2,000 km long, 3.5m high and 4.5m wide at the top. It is made of earth covered with stone.