Прочитайте текст The quality of concrete is known to depend on the properties of materials it consis...: ответ на тест 284340 - Английский язык

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The quality of concrete is known to depend on the properties of materials it consists of. The amount of constructing materials is also of great importance. Among the kinds of concrete used in modern construction there are plain concrete and reinforced, or ferro-concrete. The usage of plain concrete is practically limitless. As to ferro-concrete, it is mostly used for construction of foundations, columns, girders and beams. This kind of concrete is also rather popular for constructing bridges, dams and dock walls.
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The usage of what construction material is practically limitless?

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The quality of concrete is known to depend on the properties of materials it consists of. The amount of constructing materials is also of great importance. Among the kinds of concrete used in modern construction there are plain concrete and reinforced, or ferro-concrete. The usage of plain concrete is practically limitless. As to ferro-concrete, it is mostly used for construction of foundations, columns, girders and beams. This kind of concrete is also rather popular for constructing bridges, dams and dock walls.
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The usage of what construction material is practically limitless?

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There are some basic types of fuel for motor vehicles. There is diesel fuel, there is petrol and there is fuel mixture.
A lot of buses have diesel engines but not only a few cars have such engines. There are also a few cars with two-stroke engines but most cars have four-stroke engines.
Most lorries have diesel engines. There are not many lorries with four-stroke petrol engines but there are lorries with two stroke engines.
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What engines do a lot of buses have?

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What is a crystal? A crystal is a geometrical solid made by a natural process. Many substances absorb water from solutions when they crystallize; that is, they unite chemically with a definite proportion of water. The water with which any substance unites during the process of crystallization is called the water of crystallization.
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What is a crystal?

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Vernal is a small town in Utah, USA. In 1916 the owners of the bank in Vernal wanted a new building. They wanted the new bank to be made of bricks. However, the bricks came from a town that was very far away, and the brick makers wanted a lot of money to bring the bricks to Vernal.
The owners of the bank did not have enough money, so they found another way of getting the bricks to the town. They asked the brick makers to put them in the post. However, they could only post ten bricks at a time. There were too many packages for the postman in Vernal to take to the bank, and soon the post building was full of bricks. To help the postman, people in the town agreed to collect the bricks and take them to the new bank.
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What way of getting the bricks to the town did the owners of the bank find?

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Alfred Nobel was a Swedish chemist who lived from 1833 to 1896. Alfred and his brother made explosives, but in 1864 there was an accident in the laboratory and Alfred’s brother was killed. Alfred then decided to spend his life truing to make explosives safer to use.
One of the strongest explosives at that time was nitroglycerine. This explosive, which looks like oily water, is very dangerous to use or even to carry. Nobel wanted to study nitroglycerine so he could find a way to make it safer. Nobel had an idea of taking nitroglycerine out on a boat in the middle of a lake and working with it there.
When Nobel wanted to take the nitroglycerine he was working with from one place to another, he put it into small boxes. Then he put the small boxes into a larger box made of clay. One day, when he opened the large clay box, he found that nitroglycerine was coming out of one of the small boxes. To his surprise, the large clay box was still dry. This gave him the idea of mixing clay with nitroglycerine. The clay would take the oil out of nitroglycerine and make it safer. He called this explosive ‘dynamite’.
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Why did Alfred decide to spend his life trying to make explosives safer to use?