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
2012-12-26
47
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/4pw7777K
0
大学英语四级
相关试题推荐
A、EverythingatStateUniversityhaschangedinthepasttenyears.B、SomethingshavechangedatStateUniversityexceptthesa
Whenyouhavetomeetsomeonefromadifferentculture,beprepared.Ifyouunderstandculturaldifferences,you’llbeabetter
A、Andrewisanundergraduatestudent.B、Andrewhasworkedonanewspaperbefore.C、Andrewdoesnotwanttoworkonanewspaper.
EarthquakeCanScientistsPredictKillerEarthquakes?ThedatewasNovember23,1980.PeoplenearNaples,inSouthernItaly
ImaginesendingelectronicmailtoyourfriendintheU.S.ordiscussingyourgardeningproblemwitha【B1】______inAustralia,or
Chemistrydidnotemergeasascienceuntilafterthescientificrevolutionintheseventeenthcenturyandthenonlyratherslow
A、Postingnoticesohbulletinboards.B、Placingadvertisementsinnewspaper.C、Shoppingatsupermarkets.D、Sellingtheman’sold
Beingabletomultitaskishailedbymostpeopleasawelcomeskill,butnotaccordingtoarecentstudywhichclaimsthatyoung
A、Tohelptheoutstandingstudentsgoabroad.B、Tohelpsomepoorcollegestudentsearnmoremoney.C、Tohelpinternationalstud
A、Theplanisveryrealistic.B、Thecompetitionwillhelpthesales.C、Itisimpossibletofulfilltheplan.D、Themanshouldn’t
随机试题
国民收入经过初次分配和再分配以后,按最终用途划分为_________。
下列属于数据链路层协议的是()
A.骨瘤B.骨软骨瘤C.骨巨细胞瘤D.内生软骨瘤好发于长骨干骺端的骨肿瘤是
根管治疗过程发生的并发症中,可能引起严重后果的是
采暖冷风渗透耗热量计算,应包括的内容有_______。
容器产品焊接试板的识别标记,必须包括()
在一定情况下,对个别学生的违法违纪现象,教师可以采用()的手段,以保证教育要求的实现,但不能超越法律的限度。
控告:辩护
结构化程序所要求的基本结构不包括()。
Musicians—fromkaraokesingerstoprofessionalcelloplayers—arebetterabletoheartargetedsoundsinanoisyenvironment,
最新回复
(
0
)