Прочитайте текст и выберите утверждение соответствующее содержанию текста Graphs are very important ...: ответ на тест 800657 - Английский язык

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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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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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A student is experimenting with the remote control at the moment. He is putting a piece of white card about 2 cm in front of the control. The control is still operating because the beam is reflecting off the card and then the wall behind.
Now the student is using a piece of black card instead of the white card. This time the signal is not reaching the receiver. Why?
Answer: the black surface absorbs the infrared rays and does not reflect it back into the room.

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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.

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Ceilings are considered to be extremely important parts of any room. A well-designed ceiling is one of the most pleasing features of a room. In modern constructions the variants of ceilings are limitless.
Ceilings can be produced of many various materials both natural and artificial. Their colours, texture, pattern, and shape are of great importance for visual impression of the room. Ceilings of any materials may be attached to wood joints. Usually they are attached very carefully and tightly. They may be attached to wood joints, wood rafters, or steel joints.

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A ceiling can be a simple, level plane. Or it can be two or more sloping planes. It should be noted that these planes correspond to the form of the roof construction above.
The ceiling surface is an important functional component in any room. It can have a luminous surface or a richly ornamented and decorated surface. It is of importance to note that it should be constructed in such a way as to help control the spread of light and sound about the room. One more important feature of the ceiling surface is its resistance to the spread of fire.