Прочитайте текст и выберите утверждение соответствующее содержанию текста Walls are built to enclose...: ответ на тест 223936 - Английский язык

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Walls are built to enclose areas and carry the weight of floors and roofs. The walls may be solid or hollow. The materials used for the wall construction can be brick, stone, concrete and other natural and artificial materials.
Roofs cover the building and protect it from exposure to weather. They tie the walls and give the construction strength and firmness.

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Walls are built to enclose areas and carry the weight of floors and roofs. The walls may be solid or hollow. The materials used for the wall construction can be brick, stone, concrete and other natural and artificial materials.
Roofs cover the building and protect it from exposure to weather. They tie the walls and give the construction strength and firmness.

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A student is experimenting with the remote control at the moment. He is putting a piece of white card about 2 cm in front of the control. The control is still operating because the beam is reflecting off the card and then the wall behind.
Now the student is using a piece of black card instead of the white card. This time the signal is not reaching the receiver. Why?
Answer: the black surface absorbs the infrared rays and does not reflect it back into the room.

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Less pressure – less water consumption
Too much pressure can cause problems. And that can be very expensive. The HV 20D water distributor reduces water consumption noticeably and sensibly. The pressure reducer is easy to adjust and simple to maintain.

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It was 25 years ago that the Condominium Act was enacted in Ontario. Over the intervening years, condominiums have changed in 1967 as a low-cost alternative to rental housing, condominiums are now not only a viable and financially responsible form of housing but they also offer a lifestyle that can be exotic or as basic as consumers desire.

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Stonehenge is a circle of stones on Salisbury Plain in England. It is about 5,000 years old. The stones are huge – some are nearly 10 metres tall and they are very heavy. How did people lift these stones? They had no machines then. The blue stones in the middle of the circle come from Wales, 200 kilometres away. How did people bring these stones to Salisbury Plain? There were no trains or lorries then.