Прочитайте текст Plywood siding materials are widely used in modern construction business. They are ...: ответ на тест 800560 - Английский язык

Прочитайте текст и найдите соответствующий перевод подчеркнутого выражения.
Plywood siding materials are widely used in modern construction-business. They are popular because of their light weight and their relative cheapness. The cost of the material per unit area of wall is usually less than for other siding materials. Besides, labor costs are also relatively low. The reason for it is the fact that large sheets of plywood are more quickly installed than the boards of the same area. In many cases, if it is necessary, the sheathing can be eliminated from the building if plywood is used for siding. This operation, if it is performed, leads to further cost saving.
It should be taken into account that usually plywood sidings must be painted in order to save them for decay. But if they are produced from decay-resistant material, they can be left to weather effects without the surface coverage.

Прочитайте текст и найдите соответствующий перевод подчеркнутого выражения.
Plywood siding materials are widely used in modern construction-business. They are popular because of their light weight and their relative cheapness. The cost of the material per unit area of wall is usually less than for other siding materials. Besides, labor costs are also relatively low. The reason for it is the fact that large sheets of plywood are more quickly installed than the boards of the same area. In many cases, if it is necessary, the sheathing can be eliminated from the building if plywood is used for siding. This operation, if it is performed, leads to further cost saving.
It should be taken into account that usually plywood sidings must be painted in order to save them for decay. But if they are produced from decay-resistant material, they can be left to weather effects without the surface coverage.

Прочитайте текст
The function of a cladding is to prevent the passage of air between indoors and outdoors of a building. For this purpose it is necessary to regulate air velocities within the building. Even small air leaks are extremely harmful. Why is it so?
It is because air leaks carry water through the wall, allow vapor to condensate inside the walls, and allow noises to penetrate the walls of the building from outside.
Ответьте на вопрос
What is the function of a cladding?

Прочитайте текст
Practically every modern building is supplied with stairways of some kind. A stairway is designed to provide a means of access between different floor levels of a building. Nowadays stairways are produced of various construction materials but the most popular among them are timber and reinforced concrete. Of them timber may be used for domestic stairs of all kinds because of its economical availability. As to reinforced concrete it is popular because of its durable qualities, great resistivity to decay and great resistance to fire. It should be taken into account that domestic timber stairs must be designed for safe and comfortable use by people of different ages.
Ответьте на вопрос
What are the most popular materials for stairways nowadays?

Прочитайте текст и найдите соответствующий перевод подчеркнутого слова
Since the Stone Age, man has found many more materials that he can work with to his advantage. His ingenuity has led him to discover the potential of many natural products. However, the materials that helped him most to develop were the metals.

Прочитайте текст и найдите соответствующий перевод подчеркнутого слова
The first materials which man discovered were copper and gold, because they occur naturally in the pure state. They were used because they could be shaped easily, gold being especially soft. The discovery that copper could be obtained in sufficient quantities for beating into vessels and weapons was an important step in the use of metals, but the discovery that copper ore would produce copper was probably accidental.