Activated carbon is an example of _____ a substance with porous surface.: ответ на тест 229960 - Английский язык

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст.
1_______. If all the carbon and carbon compounds were suddenly removed from the earth it would look like the surface of the Moon. 2_______. In an ordinary pencil, for example, the inside of the pencil made from graphite, which is an elementary form of carbon, the wood and the paint on the surface of the pencil are all carbon or carbon compounds. The paper of a book, the cover are also made of carbon compounds. All of the clothes one wears including shoes cannot exist without carbon. 3_______. Fuels, foods and many drugs are mostly made of carbon compounds. 4_______.

Прочитайте текст.
What is steel as a construction material? Steel may be classified as iron with the controlled amount of carbon. The amount of carbon in steel is generally less than 1.7 per cent. Ordinary structural steel should contain less than three tenth of one per cent carbon. This kind of steel also contains small amounts of phosphorus, sulfur, oxygen, nitrogen and silicon. Like iron and its alloys, steel belongs to ferrous metals. It is hard substance. Accordingly, it can be pulled, forged and melted. Generally, steel, this strong metal, like other metals, is a good conductor of electricity. Alloyed steel and stainless steel are corrosion-resistant kinds of steel.
Закончите предложение:
Steel belongs to …

Geologists use the method of _____ to explore sand-clay ground.

If we burn limestone with water we get _____ which is used as binder in building.

_____ of mountains leads to their destruction.

The skiing in these mountains is very dangerous in winter because of snow _____.