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
2023-06-23
26
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] All of the following concerning the safety glass are discussed in the text EXCEPT _____.
选项
A、its uses
B、its strength
C、its structure
D、its limitations
答案
D
解析
推理判断题。本题考查列举处,用排除法可以找出答案。第3段中除选项D外,选项A可从第1句推断,选项B可从最后一句推断,选项C可从第2句推断。
转载请注明原文地址:https://tihaiku.com/zcyy/2776136.html
相关试题推荐
[originaltext](1)ThenumberofpeopleintheUnitedStateswithoutahomeisdo
[originaltext]Mostpeoplefeellonelysometimes,butitusuallyonlylasts
[originaltext]Mostpeoplefeellonelysometimes,butitusuallyonlylasts
[originaltext]Mostpeoplefeellonelysometimes,butitusuallyonlylasts
[originaltext]Inthenextfewdecades,peoplearegoingtotravelverydiff
[originaltext]Thethoughtofhavingnosleepfor24hoursormoreisn’tap
[originaltext]Manypeoplecatchacoldinthespringtimeorfall.Itmakes
Oneprincipleoftaxation,calledthebenefitsprinciple,statesthatpeople
Oneprincipleoftaxation,calledthebenefitsprinciple,statesthatpeople
Oneprincipleoftaxation,calledthebenefitsprinciple,statesthatpeople
随机试题
TherewassuchalongqueueoutsidetheChinaPavilionthatwe______gaveup.A、un
StressStresscanbedefinedasanada
Whatisthepurposeofthisletter?ToaskABCCo.,Ltd.whethertheywouldlike
患者,22岁,食欲减退,乏力,进行性黄疸8天,24小时尿
现代舞是不断地以身体的叛逆去争取人性的自由与民主的艺术。()
大学教师常用的解决心理问题的方式有()A.学会倾诉自己的压力和情绪 B.
既可以清肺火、清胃火,又可泻肾火的是A:黄柏B:知母C:栀子D:石膏E:
金融寡头是指操纵国民经济命脉,并在实际上控制国家政权的少数垄断资本家或垄断资本家
女性,42岁,会计。2个月前出现颈部不适、酸胀感,近3周发展为颈肩痛,随之疼痛向
主要采用专家判断法确定的效度指标是()。A.预测效度 B.构想效度 C.效标
最新回复
(
0
)