Английский язык. Болсуновская Л.М - 6 стр.

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ALUMINIUM
Aluminium is the most common metal on Earth. It occurs naturally in
many different kinds of rocks. But most of the aluminium we use is extracted
from an ore called bauxite, which is formed over, long periods by the
weathering of rocks containing aluminium silicates (aluminium, silicon and
oxygen).
In 1886 two chemists independently discovered how to extract aluminium
using electricity. Their discovery reduced the price of aluminium to a fraction
of the price of silver in four years. The two chemists were Charles Martin
Hall (1863 - 1914), a student at Oberlin College in the USA, and P.L.T.
Heroult (1863 - 1914), a young chemist working in France. By coincidence,
they were not only the same age when they made their discovery, but also
died within eight months of each other.
Before this, the metal was much more expensive than silver and gold. The
Emperor of France, Napoleon III, for example, used aluminium plates to
impress the most important guests. Today we use aluminium foil to wrap
food because it is so cheap.
Aluminium is also durable, light and a good conductor of electricity. It is
used to protect metals against corroding because when the surface of
aluminium reacts with oxygen in the air, a thick coating of aluminium oxide
forms that seals a metal from the air. It is also used to make parts for planes,
cars, and lorries, to make electric cables.
1) Соотнесите русские и английские словосочетания.
1. it occurs naturally
2. over long periods
3. by coincidence
4. to seal a metal from the
air
5. aluminium foil
a) по случайному стечению обстоятельств
(случайно)
b) алюминиевая фольга
c) встречаться в природе
d) защищать металл от доступа воздуха
e) в течение долгого времени
2) Найдите в каждом ряду слово, противоположное по значению
первому слову ряда.
1. similar a) simple b) same c) different d) complete
2. common a) usual b) extraordinary c) proper d) natural
3. expensive a) costly b) essential c) special d) cheap
4. durable a) malleable b) valuable c) unreliable d) possible
5. reduce a) decrease b) remove c) remake d) increase

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