质疑英文同等学力英语每日一练(2013-12-8)——学苑教育

2021年1月7日发(作者：钱廷熙)
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同等学力英语每日一练（2013-12-8）
2014年参加同等学力的考生们，学苑教育献上同等学力英语每日一练，我们将每天发布
1--5道习 题，帮助大家夯实基础。大家可随时关注学苑教育同等学力考试频道，我们将第一
时间公布相关考试信息 。
For thousands of years, people thought of glass as something beautiful to look
at. Only recently have they come to think of it as something to look through. Stores
display their goods in large glass windows. Glass bottles and jars that hold food
and drink allow us to see the contents. Glass is used to make eyeglasses,
microscopes, telescopes, and many other extremely useful and necessary objects.
Until the Second World War, most of the glass used for optical instruments was
imported from Europe. However, during the war Americans could not get European glass,
and they were forced to make their own. As a result, new kinds of glasses were
developed that had been previously unknown. These new effects were achieved by mixing
other chemical elements with the sand. Some of these new glasses are very strong
and can resist many kinds of shocks. Legend has it that a very hard glass was invented
by a Roman who showed his discovery to the Emperor. When the Emperor saw the glass
he feared that it would become more valuable than gold and silver, making his treasure
worthless. Therefore, he had the glassmaker killed, and the secret was not discovered
again for hundreds of years.
In the present century, safety glass was invented for use in modem cars and
planes. Safety glass is made by placing a layer of plastic between two layers of
plate glass. When the outside layer of glass is broken, the pieces do not scatter
and injure people. Some glass of this type is strong enough to resist
bullets. .Although in recent years plastics have replaced glass under conditions
where glass might be easily broken, there are new uses being developed, for the
greatest advantage of glass is that its component narts are inexpensive and can be
found all over the world.
1. With the passage of time, glass_______.

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