首页
登录
职称英语
For thousands of years, people thought of glass as something beautiful to lo
For thousands of years, people thought of glass as something beautiful to lo
游客
2024-02-02
19
管理
问题
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 modern 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 parts are inexpensive and can be found all over the world. [br] New uses of glass are being developed on the ground that _____.
选项
A、glass is not as safe as plastics
B、glass is not as strong and durable as plastics
C、glass is easily obtainable and inexpensive
D、glass is more and more widely used
答案
C
解析
本题解题的关键在于注意最后一段中的“there are new uses being developed,for…”,这里表明了一对因果关系,for后面引出不断研发玻璃新用途的原因,由此可见,本题正确选项应为C。选项A和B中提到的玻璃的缺点虽在现实中也是有可能的,但文中并无字句说明因为这些缺点而要不断研发玻璃的新用途。
转载请注明原文地址:https://tihaiku.com/zcyy/3414907.html
相关试题推荐
[originaltext]WeddingsintheUnitedStatesvaryasmuchasthepeopledo.
EndangeredPeoplesA)Today,itisnotdistance,butcult
EndangeredPeoplesA)Today,itisnotdistance,butcult
EndangeredPeoplesA)Today,itisnotdistance,butcult
EndangeredPeoplesA)Today,itisnotdistance,butcult
[originaltext]M:Doyouthinkyoungpeoplearegiventoomuchfreedomnowadays,
[originaltext]M:Doyouthinkyoungpeoplearegiventoomuchfreedomnowadays,
[originaltext]M:Doyouthinkyoungpeoplearegiventoomuchfreedomnowadays,
TheGreatWallisthesymboloftheChinesenationandChinesepeoplearepr
Manyyoungpeoplebelievegoodgrades,excellentinternshipswilllandthem
随机试题
[originaltext]Moderator:Goodevening,ladiesandgentlemen.It’smyg
消费者在购买商品时,不享有的权利是A.无理由退货 B.自主选择商品 C.人身
导游向旅游者索要小费的,由旅游主管部门责令退还,处2000元以上1万元以下罚款,
2014年前9个月江苏钢材产量稳步增长。其中1~2月产量为1932万吨,累计同比
左边给定的是纸盒外表面的展开图,右边哪一项能由它折叠而成?请把它找出来。
下列叙述错误的是A:重镇安神药质重沉降,多为矿石介类B:养心安神药多为植物药,
初孕妇,29岁,妊娠28周。近日自感头晕、头痛,产检时发现血压158/110mm
中心静脉压的正常值范围是()。A.2~3cmH2O B.3~4cmH2O
期货从业人员不得阻扰或者拒绝投资者另外委托其他期货经营机构或者期货从业人员提供服
(2016年真题)期权按照标的物不同,可以分为金融期权与商品期权,下列属于金融期
最新回复
(
0
)