Прочитайте текст и выберите утверждение соответствующее содержанию текста A student is experimenting...: ответ на тест 782283 - Английский язык

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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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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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Less pressure – less water consumption
Too much pressure can cause problems. And that can be very expensive. The HV 20D water distributor reduces water consumption noticeably and sensibly. The pressure reducer is easy to adjust and simple to maintain.

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By 2050, cars will turn on new, clean fuels and they will go very fast. Cars will have computers to control the speed of the car and there won’t be any accidents. Today, many cars have computers that tell drivers exactly where they are. By 2050, the computer will control the car and drive it to your destination.

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By 2050, robots will replace people in factories. Many factories already use robots. Big companies prefer robots – they don’t ask for pay rises or go on strike, and they work 24 hours a day. By 2050, we will see robots everywhere – in factories, schools, offices, hospitals, shops, and homes.