A new material as nylon has been accepted. It is material for the manufacture of bearings and runner...: ответ на тест 1006943 - Английский язык

Прочитайте текст и ответьте на вопрос:
When will nylon operate satisfactorily without lubrication?
A new material as nylon has been accepted. It is material for the manufacture of bearings and runners of all sizes in many types of machines, earth-moving equipment and agricultural machinery due to its fundamental characteristics of low friction and good wear resistance. Nylon is a very versatile material and is capable of overcoming a wide range of difficult problems. It will operate satisfactorily without lubrication in an abrasive atmosphere. One of its features is that nylon functions under water or is immersed in any other liquid. Being non-toxic nylon is frequently used in food machinery. Nylon gears usually do not require lubrication, they are shock-resistant, do not deform permanently and – running in train with metal gears – they outlast them.

Прочитайте текст и ответьте на вопрос:
When will nylon operate satisfactorily without lubrication?
A new material as nylon has been accepted. It is material for the manufacture of bearings and runners of all sizes in many types of machines, earth-moving equipment and agricultural machinery due to its fundamental characteristics of low friction and good wear resistance. Nylon is a very versatile material and is capable of overcoming a wide range of difficult problems. It will operate satisfactorily without lubrication in an abrasive atmosphere. One of its features is that nylon functions under water or is immersed in any other liquid. Being non-toxic nylon is frequently used in food machinery. Nylon gears usually do not require lubrication, they are shock-resistant, do not deform permanently and – running in train with metal gears – they outlast them.

Greek houses had a courtyard in the middle and round their courtyard ran a covered walk, its ceiling supported by pillars. There were special women’s quarters, usually upstairs on the second storey.
In Rome bricks were used for building and houses were often finished with plaster over bricks on both inside and outside walls. The centre of family life was a garden-courtyard, surrounded by columns and with rooms opening out into it.
The earliest houses in Britain were round, built of wood or wicker basket work plastered over with clay. In the centre of the house was the hearth and light came in through the hole in the roof above it and through the door because there were no windows.
Правильным переводом подчеркнутого грамматического явления является …

I know a lot of interesting work has been done in Scandinavia, and, of course, I’ve read about the work of Le Corbusier in France and I’d like to see what American architects are doing now. You may know the work of the American architect Frank Lloyd Wright. He designed the Imperial Hotel in Tokyo. It was designed to resist earthquakes and it proved so strong that it did. It was one of the few buildings in Tokyo that did not fall in the terrible earthquake of 1923.
Правильным переводом подчеркнутого грамматического явления является …

Buildings of the 19th century are characterized by the use of new materials and by a great diversity of architectural styles. From the end of the 18th century iron and steel became widely used as alternatives to wood, for by that time many countries experienced shortage of this material. Later the Industrial Revolution brought mass-production of building parts which were manufactured at a factory and then simply assembled at a site.
Правильным переводом подчеркнутого грамматического явления является ...

Nowadays a building’s framework is made of reinforced concrete and of structural steel. Concrete is made by mixing together small stones, sand, cement and water. The coarse stones used in the mix give the concrete its strength. The sand is needed to fill the gaps between the stones. The cement, mixed with just enough water to make it into a paste, covers the surface of all solids, and binds the entire mixture into single mass. It is used less water to make mixing concrete denser and stronger. It is a difficulty here. Dry mixing concrete is not so easy to stir as one that is fairly wet and sloppy. When it is really strong concrete, it is mixed with the necessary minimum of water and placed in the forms. After this it is vibrated with electrically vibrated bars. The mixture is tipped or piped into forms (wooden mold) of the shape required.
Закончите предложение согласно содержанию текста:
The sand is needed …