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
2024-01-25
39
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
推理判断题。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/3392423.html
相关试题推荐
Contrarytopopularbelief,olderpeoplegenerallydonotwanttolivewith
Contrarytopopularbelief,olderpeoplegenerallydonotwanttolivewith
Contrarytopopularbelief,olderpeoplegenerallydonotwanttolivewith
Contrarytopopularbelief,olderpeoplegenerallydonotwanttolivewith
Contrarytopopularbelief,olderpeoplegenerallydonotwanttolivewith
Contrarytopopularbelief,olderpeoplegenerallydonotwanttolivewith
[originaltext]"Family"isofcourseaflexibleword.ButwhenBritishpeople
[originaltext]"Family"isofcourseaflexibleword.ButwhenBritishpeople
[originaltext](16)Itiswhatfaileddietershavelongsuspected:Fatpeople
[originaltext](1)MillionsofpeopleacrosstheeasternUnitedStatesarecleari
随机试题
Angerisanemotionthatcanbedifficulttodealwith.Sometimesit’sexper
禁用地高辛的情况包括()A:肥厚型心肌病 B:风湿性心脏病单纯二尖瓣狭窄伴窦
A.肌壁间肌瘤 B.黏膜下肌瘤 C.浆膜下肌瘤 D.游离性肌瘤 E.阔韧
自2017年1月1日起,我国全面放开食盐出厂、批发和零售价格,转由企业根据生产经
基金投资者教育活动的内容不包括()。A.风险教育 B.投资咨询C.风险提示
测绘项目发包的方式包括()两种方式。A:招标发包和委托发包B:招标发包和直接发
我国耕地面积占世界耕地总面积的7%,林地面积占世界林地总面积的( )。A.3%
银行可以对借款人采取终止提款措施的情况包括( )。A.挪用贷款 B.未按合
非银行金融机构除了通过自身渠道外,还可利用商业银行渠道,向客户提供个人理财服务。
甲基的间接供体A.PRPP B.N5-CH3-FH4 C.FH4 D
最新回复
(
0
)