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
46
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.
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://kaotiyun.com/show/lDd7777K
0
大学英语四级
相关试题推荐
YoungpeopleintheUnitedStatesarefallingbehindtheiroverseaspeersinreading,mathandscience,PresidentBarackObamas
A、Becausetheythinkit’shelpfultotheirstudy.B、Becausesurfingonlineisbeneficialtochildren’swriting.C、Becausethe
A、Around80%ofTaiwan’syoungpeopleand55%oftheentirepeople.B、About400,000people.C、About40millionpeople.D、Around
A、Becausetheyweredevelopedverywell.B、Becausetheywereportableforeveryconsumers.C、Becausetheysoldverywellinthe
A、Theywantedtomakeafortune.B、Theysoughtforfreedomofworship.C、Theyobeyedtherequirementoftheirgovernment.D、They
A、Itdoesnothelpthemajorityofpoorpeopleinacountry.B、Itdoesgoodtomostpeopleintheworld.C、Itcannotexertits
A、Thepersoninchargeisnotintheoffice.B、Thesuppliesareoutofstockforthemoment.C、Theyfailedtoreachanagreement
TechnologicalchangesbroughtdramaticnewoptionstoAmericanslivinginthe1990s.Duringthisdecadenewformsofentertainme
A、InWashington.B、InNewYork.C、InSanFrancisco.D、InPhiladelphia.D细节题。文中提到,1974年的第一次大陆会议(TheFirstContinentalCongress)是在t
A、Mostnicknamesarequiteinteresting.B、Somestatenicknameshavesurprisingorigins.C、GeorgeWashingtonhasmanynicknames.
随机试题
推磨研点时压力不均,研具伸出工件太多,按出现的假点刮削,会导致刮削面精度不准确。( )
虫积腹痛宜选用龋齿疼痛宜选用
以下哪穴不是足太阳膀胱经的五输穴
受破产宣告未经复权者不能从事证券代理事务。()
学前时期一般是指()。
对于中国人来说,院落不仅是一个物理的空间。而且是家的核心。有院落的地方,就有我们最真实纯朴的情感与记忆。巷、道、瓦、檐、廊等这些_________,形成了传统院落独具特色的形式美感和空间氛围。中国人几千年来形成的特有的生活方式、人文情怀,决定了我们对自己栖
中国可利用地热的能源储量超过了国内所有化石类燃料加起来的能源储量,在某些地区把地热转变成电能的技术已经成为现实,中国下个世纪可能出现的能源短缺问题将由此而彻底解决。以下哪项如果为真,最能削弱作者的上述观点?
Immigrationisintheheadlinesagain,withPresidentObama’sdecisionlastweektostopdeportingyoungillegalimmigrantswho
Tomwasfourteenyearsold.Hestudiedinamiddleschool.Tomwasgoinghomeatfiveyesterday.Hegotonabus.Amotherwith
Scientistsnowtendtoagreethatthenoiselevelforpotentialhearinglossbeginsatabout70decibels.Someofthemarevery
最新回复
(
0
)