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
13
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://www.tihaiku.com/zcyy/2776131.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]Thethoughtofhavingnosleepfor24hoursormoreisn’tap
[originaltext]Manypeoplecatchacoldinthespringtimeorfall.Itmakes
[originaltext]Manypeoplecatchacoldinthespringtimeorfall.Itmakes
Oneprincipleoftaxation,calledthebenefitsprinciple,statesthatpeople
随机试题
[originaltext]W:There’sisanelementthereaboutcompetitionthough,isn’tth
Foryearstherehavebeenendless.articlesstatingthatscientistsareont
Inthisexperiment,theywerewakenedseveraltimesduringthenightandaskedto
Almosteveryoneagreesthattheabilitytoreadandwriteshouldbeafundam
“物必先腐,而后虫生。”这一古训所体现的哲理是:A.事物联系具有普遍性和多样性
下列关于全国股转系统挂牌的基本流程的说法中错误的是( )。A.决策改制阶段最为
截至2015年底,中国创业投资各类机构数已达1775家,同比增长14.4%。其中
下列选项中,组织工程建设实施,负责控制工程投资、工期和质量的是()。A.项目总经
在某关于阿司匹林与心肌梗死关系的研究中,按照标准,病例和对照都应排除慢性关节炎和
癌性胸腔积液 A.胸腔积液WBC>10X109/L伴恶臭 B.血性胸腔积液,
最新回复
(
0
)