首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
For thousands of years, people thought of glass as something beautiful to look at. Only recently have they come to think of it a
For thousands of years, people thought of glass as something beautiful to look at. Only recently have they come to think of it a
admin
2020-04-01
69
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.
By telling the legend, the author wants to _____.
选项
A、prove that the Roman was the first inventor of hard glass
B、support that the Americans were as clever as the Romans
C、give some interesting information about hard glass
D、provide a historical event concerned with hard glass
答案
C
解析
推理判断题。本题考查例子与主题的关系。作者引用传说,只是为了使文章读起来更有趣。这是一个传说,不一定是真实的,因此,它不能被视为选项D所提及的历史事件,也不能证明是罗马人第一个发明坚固的玻璃,所以选项A也是不对的。选项B与本段内容无关,本段主要说明了美国人开发出新的玻璃制品的来由,并无说明美国人聪明之意。
转载请注明原文地址:https://kaotiyun.com/show/YDd7777K
0
大学英语四级
相关试题推荐
A、Purpleteaisveryexpensive.B、Purpleteaisgrowninspecialplaces.C、Purpleteadoesharmtopeople.D、Purpleteaisbette
A、Teamakespeoplemorehealthy.B、Teahasalonghistory.C、Frequentteadrinkersenjoyalongerlifespan.D、Teahasmorenutr
A、Thestorewillnotbeinbusinessifthemancan’tgethismoneyback.B、Thestoreismisleadingwithitsbeautifuladvertisin
A、Therearemysteriousstoriesbehindhisworks.B、Therearemanymisunderstandingsabouthim.C、Hisworkshavenomatchworldwi
Weallknowthereexistsagreatvoid(空白)inthepubliceducationalsystemwhenitcomesto【C1】______toSTEM(Science,Technol
Weallknowthereexistsagreatvoid(空白)inthepubliceducationalsystemwhenitcomesto【C1】______toSTEM(Science,Technol
CanBurglarsJamYourWirelessSecuritySystem?A)Anyproductthatpromisestoprotectyourhomedeservescarefulexamination.S
TeamSpirit[A]Teamshavebecomethebasicbuildingblocksoforganisations.Recruitmentadvertisementsroutinelycallfor"tea
A、Hehasneverdrivenhisowncartowork.B、HemovedtoWashington,D.C.6yearsago.C、HewashitbyacartwiceinPortland.
A、Mostnicknamesarequiteinteresting.B、Somestatenicknameshavesurprisingorigins.C、GeorgeWashingtonhasmanynicknames.
随机试题
50mL水样中加纯水50mL,加5.00mL的H2SO4,加10.00mL的c(1/5KMnO4)为0.0100mol/L的高锰酸钾溶液,水浴加热30min后,加10.00mL的c(1/2Na2C2O4)为0.0100mol/L的草酸钠溶液,用高锰酸钾溶液
人民代表大会制度是我国的根本政治制度,这是因为它
大多数病原菌
使用1mg/L的标准溶液进行测定时,甲得到的结果分别是0.95mg/L、0.99m/L和1.03mg/L,乙测得的结果分别为1.73mg/L、1.74mg/L和1.75mg/L。通过分析可以得出()结论。
监理业务具有一定的程序性,以下是其流程:①接受监理任务;②确认或委派项目总监理工程师;③成立项目监理机构;④收集有关工程资料;⑤按合同编制监理规划或分项分阶段编制监理实施细则;⑥监理工作交底会(第一次监理例会);⑦实施监理工作;⑧工程初验;⑨监理总结、建档
股权市场被认为是资本市场的一部分。()
()是根据外部信息的启发,对自己脑内已存入的记忆表现进行检索的思维活动。
某地的一项调查表明,参加各种公务员考试考前辅导班的考生,他们在实际考试中的平均成绩反而低于未参加任何辅导班的考生。因此,考前辅导不利于考生的成功应试。为使上述结论成立,必须假设的是()。
罗森塔尔关于教师期望的实验研究说明了()
在面向对象方法中,类之间共享属性和操作的机制称为【】。
最新回复
(
0
)