Вопрос № 150661 - Английский язык
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Prestressed concrete is a relatively young product. It started to be widely used only during the last few decades, and is still gaining popularity. The reason of its popularity is its usefulness. The main good qualities of prestressed concrete are its high strength and durability. In prestressed concrete, concrete is combined with steel. This combination is highly advantageous. It serves the purpose of producing a compressed stress in the concrete as a building material. For this reason any member of beam is under constant compression and as a result has no cracks. In modern times this type of concrete serves as construction material for beams, for pipes, and columns, storage tanks, water towers and the like.
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The reason of popularity of prestressed concrete is …
Prestressed concrete is a relatively young product. It started to be widely used only during the last few decades, and is still gaining popularity. The reason of its popularity is its usefulness. The main good qualities of prestressed concrete are its high strength and durability. In prestressed concrete, concrete is combined with steel. This combination is highly advantageous. It serves the purpose of producing a compressed stress in the concrete as a building material. For this reason any member of beam is under constant compression and as a result has no cracks. In modern times this type of concrete serves as construction material for beams, for pipes, and columns, storage tanks, water towers and the like.
Закончите предложение:
The reason of popularity of prestressed concrete is …
Вопрос задал(а): Анонимный пользователь, 04 Сентябрь 2017 в 13:16
На вопрос ответил(а): Любимов Павел, 04 Сентябрь 2017 в 13:16
На вопрос ответил(а): Любимов Павел, 04 Сентябрь 2017 в 13:16
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Перед Вами конверт.
Соотнесите информацию под определенным номером на конверте с тем, что она обозначает.
the street name in the return address
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the addressee
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The system of education in Britain is divided into three stages: _____.
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Henry Cavendish was born in 1731 and died in 1810. He was an English nobleman who did scientific experiments as a hobby. In 1781 he made the important discovery that water is not an element but a compound of the gases we now call hydrogen and oxygen. He described his experiments to the Royal Society in 1785.
His method was new. He showed that if electric sparks are passed through a mixture of hydrogen and oxygen the two gases combine explosively and form water. This was a dangerous experiment. Cavendish did his experiment safely;
he wisely used a strong brass container for the gases. He also passed electric sparks through air and found that gases which readily dissolve in water form acids. We explain this reaction today as follows: oxygen and nitrogen combine and form oxides of nitrogen.
Cavendish also noticed that air contained a small proportion of a gas which did not combine with any other gas even if we pass electric sparks through it for a long time. Now we think that this gas was probably argon, one of the inert gases. It was rediscovered many years later.
Henry Cavendish was born in 1731 and died in 1810. He was an English nobleman who did scientific experiments as a hobby. In 1781 he made the important discovery that water is not an element but a compound of the gases we now call hydrogen and oxygen. He described his experiments to the Royal Society in 1785.
His method was new. He showed that if electric sparks are passed through a mixture of hydrogen and oxygen the two gases combine explosively and form water. This was a dangerous experiment. Cavendish did his experiment safely;
he wisely used a strong brass container for the gases. He also passed electric sparks through air and found that gases which readily dissolve in water form acids. We explain this reaction today as follows: oxygen and nitrogen combine and form oxides of nitrogen.
Cavendish also noticed that air contained a small proportion of a gas which did not combine with any other gas even if we pass electric sparks through it for a long time. Now we think that this gas was probably argon, one of the inert gases. It was rediscovered many years later.
An English nobleman
A Hobby
The Royal Society
Henry Cavendish and His Discovery