Вопрос № 782125 - Английский язык

Прочитайте текст и заполните пропуски подходящими по смыслу словами 1_______ metals are based on iron. They are usually 2_______ with carbon because it increases the strength of 3_______ and makes it much more useful to the engineer. Slight variations in carbon content can make very great differences in the properties of the metal. Wrought iron is a ferrous metal with carbon content of less than 0.05 %. Chains and 4_______ can be produced from this alloy.

Прочитайте текст и заполните пропуски подходящими по смыслу словами 1_______ metals are based on iron. They are usually 2_______ with carbon because it increases the strength of 3_______ and makes it much more useful to the engineer. Slight variations in carbon content can make very great differences in the properties of the metal. Wrought iron is a ferrous metal with carbon content of less than 0,05 %. Chains and 4_______ can be produced from this alloy.

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The universe is energy. Energy 1 _______ in a variety of forms that include everything, from an atomic particle to a group of galaxies. Everything around us is matter and matter is 2 _______ from atoms.
We know over one 3 _______ kinds of basic atoms. They correspond to basic elements like nitrogen, oxygen, carbon, and others. An atom is a unit of matter.
Atoms form groups called molecules. Different 4 _______ of atoms or molecules created different kinds of matter. An oxygen molecule, for example, is made from two oxygen atoms. A carbon dioxide molecule is made from two oxygen atoms and one carbon atom.

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There are two basic 1 _______ of molecules: small molecules and macromolecules. Small molecules are in non-living matter – minerals, air, 2 _______.
Macromolecules are made from many small molecules. They 3 _______ in living matter, i.e. in plants and animals including people. Macromolecules also exist in some synthetics like polythene and 4 _______.
Macromolecules are not living matter but they combine to create cells. Cells are basic units of life.

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Benjamin Franklin, 1 _______ of the lightning rod, explained that positive (+) and negative (−) charges are 2 _______ types of the same thing. Opposites are a basic characteristic of 3 _______. They 4 _______ to show nature’s duality: positive-negative, good-bad, something-nothing.

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An example of interaction between electric charges is lightning. During an 1 _______ storm, water and ice particles collide inside cumulonimbus clouds. As a result, the positive charges move to the top of the clouds and the negative 2 _______ move to the bottom. The movement generates static 3 _______. When the negative charges flow back to the positive charges they produce heat and emit light. Lightning is an electric discharge in the air. Thunder is a 4 _______ of pressure that occurs when the hot and violent lightning expands the cold air.