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That a person could live in the modern world without
synthetic substances is probably possible, but whoever tried to do it would soon
miss many common things. (46) Just imagine how many
varieties of plastics there are. They can be harder than wood or .softer than
rubber. They can even be made resistant to fire, water and
electricity. Whoever visits the world’s market places will find
that plastics are being made and used everywhere. Plastic articles can be
produced at a rather low cost. The machines for molding them are not large or
heavy. Most of the products can be stored and transported easily. (47)
. As a matter of fact, many kinds of materials for
clothing have plastics in them. They are made of plastic fibres and are known by
special names such as nylon or dacron. Clothing made of plastic fibres has
certain advantages over that of natural fibres like cotton, wool, or silk.
(48) . (49) The earliest
variety of plastics was called "celluloid". It appeared on market over a hundred
years ago. In 1912, an American scientist presented to the world a hard plastic
material known as "bakelite". The 1940’s saw a faster development of plastics.
An even larger variety of plastic materials came into practical use. Now
plastics find wide application not only in our daily life, but also in
engineering. The Germans have manufactured a car which is almost completely made
of plastics. The famous British engine builders have produced an aeroplane
engine made mostly of plastics. It is really true that
plastics are for everyone. And the fact that the total volume of plastics in use
is on the increase suggests that more and better plastics will be made in the
near future. (50) . A. Besides plastic pens,
combs and tooth brushes, he would be without many kinds of cloth as well as some
necessary parts for radios and television sets. B. The history
of plastics is longer than you might expect. C. That’s why
factories for making them can be found in many countries. D.
The former is lighter in weight, easier to wash and dry, keeps in shape much
longer and does not wear out so quickly. E. It is not likely
that plastic fibers will compelely take the place of natural fibers.
F. Perhaps we could call it the Plastic Age.