ВУЗ:
Составители:
Рубрика:
Нагреваясь (при нагревании) молекулы
двигаются интенсивнее
1. When cooled water becomes ice.
2. The work done took much time.
3. Being invited too late me friend couldn’t come
4. A magnet attracts only things containing iron.
5. He bought the recommended book.
6. When writing a telegram we must use as few words as
possible.
7. Having waited for him half an hour they went home.
V. Завершите следующие предложения, употребляя
герундий. Переведите предложения на русский язык.
Образец: This book is worth (read) – This book is worth
reading.
1. (have) good friends is important.
2. I don't mind (wait).
3. They were afraid of (miss) the train.
4. Is (learn) a second language difficult?
5. I thought of (take) a trip to Lake Baikal.
VI. а) Прочитайте текст и ответьте нa вопрос:
What source of energy does the world need in the near
future?
SOLAR ENERGY
1. Shortage of energy is major world problem and experts
predict that the present rate of increase in energy use could
exhaust the supply of fuels in the twenty-first century. What the
world needs is a source of perpetual energy.
2. Potentially, we have a source of perpetual energy shining down
on us. The sun. On clear day in the tropics, the intensity of solar
energy can be more than a kilowatt per square metre at mid-day.
That amount of energy falling on an area of sixty-four square
kilometres is about as much as the whole of the British electricity
generating system produces.
3. There is no charge for the energy that flows so freely from the
sun.
4. Unfortunately its collection and storage can be both difficult
and expensive. Some form of storage is necessary because the
sun's rays do not reach us on cloudy days or at night. None the
less, solar energy is now an economic and practicable solution
and is widely used in many countries.
5. It is possible to convert solar energy directly to electricity by
the use of photoelectric cells but for most practicable purposes
this is too expensive a way to produce electricity. Today’s solar
energy systems are of two main types, based on the flat plate
collector and the focusing collector. The flat plate collector is
simpler and cheaper. In its simplest form, the sun's rays fall onto
a panel.
Pipes carrying water are embedded in the panel. The sun heats the
water, which is then available for use. Modern flat plate
collectors are carefully designed to absorb the maximum possible
amount of energy and to prevent heat loss to the surroundings.
They are mainly used for the provision of domestic hot water.
They are commercially available and are in use in many countries
including Australia, Japan, Cyprus, Brazil and Israel.
6. Focussing systems enable a much higher proportion of the
sun’s energy to be trapped and also produce much higher
temperatures. Temperatures up to 4,000˚С have been reached in
the solar-powered Odeillo furnace in the Pyrenees. The principle
has been known for along time, Archimedes used it in 212 B.C.
when he used focussing mirrors to set fire to the Roman fleet.
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