Прочитайте текст и выберите утверждение соответствующее содержанию текста Copper is a red metal. It ...: ответ на тест 284587 - Английский язык

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Copper is a red metal. It is harder and stronger than aluminium and more flexible than steel. Electric wires are generally made of copper because this metal has a high electric conductivity. However, copper is heavier than aluminium and steel.

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Copper is a red metal. It is harder and stronger than aluminium and more flexible than steel. Electric wires are generally made of copper because this metal has a high electric conductivity. However, copper is heavier than aluminium and steel.

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The roof is a necessary component of practically every building. It serves to protect the interior of the building from rain, snow, wind, and cold. There exist many types of roofs, the main ones being sloping (pitched) roofs and flat (or nearly flat) ones.

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Engineering is a very practical activity. It is the process of applying the latest achievements of science and technology into practice.
There are a lot of branches in engineering. Mechanical engineers are experts in the design and manufacture of tools and machines. Mechanical engineering has marine, automobile, aeronautical, heating and ventilating branches.

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Graphs are very important for recording the results of any experiments. Now the students are drawing graphs in their exercise books. First, they are giving the graphs a little. Then they are drawing the axes and putting the independent variable along the bottom of the graph paper (the horizontal axis). The other variable depends on this one and the students are drawing it up the side of the paper (the vertical axis). It is also called the dependent variable. The origin of the graph is usually the point (0,0).

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The students of the technical school were carrying out the experiment with a multimeter in the lab last week. They were checking a mains socket in the wall and they were following all the safety instructions. Paul was using two probes that time. While he was inserting them into two terminals of the socket, his groupmate Alex was turning the function selector switch to the VAC (voltage alternating current) range. The needle was indicating the pressure of electricity, i.e. the voltage in the mains. Everybody was watching the indications on the volts scale. It was 220 volts. Next time they are planning to measure the current in a table lamp.