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
2024-01-25
6
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/3392397.html
相关试题推荐
Theinnervoiceofpeoplewhoappearunconsciouscannowbeheard.Forthef
Theinnervoiceofpeoplewhoappearunconsciouscannowbeheard.Forthef
Theinnervoiceofpeoplewhoappearunconsciouscannowbeheard.Forthef
Theinnervoiceofpeoplewhoappearunconsciouscannowbeheard.Forthef
[originaltext]W:Bob,willyoutellmesomethingaboutthenewintelligenthous
[originaltext](1)ThenumberofpeopleintheUnitedStateswithoutahomeisdo
[originaltext]Somekindsofmentalskillsnaturallydecreaseaspeopleget
[originaltext]Somekindsofmentalskillsnaturallydecreaseaspeopleget
[originaltext]Somekindsofmentalskillsnaturallydecreaseaspeopleget
[originaltext]W:Youhavesomethingonyourmind,Philip.M:Yes,Ido.Ihada
随机试题
Attachedarethecompletedapplicationformsforadmissionandfinancialaidfor
我国少数民族进入社会主义社会主要是通过( )①民族区域自治②民主改革③土
黄体由哪两种细胞组成A.颗粒黄体细胞和门细胞 B.颗粒黄体细胞和卵泡膜黄体细胞
血细胞从原始到成熟,不符合一般规律的是A.颗粒从有到无B.核仁从有到无C.体积从
共用题干 HowtheBodyKeepstheSameTemper
A左边一组中,图一第四行的第三格黑色方块位置保持不变,第二列的黑色方块每次上移1格,第三列第二行的黑色方块每次下移1格。据此规律,右边一组中,图一第四行第三列的
A
依据《艾滋病防治条例》的规定,具体从事本行政区域内艾滋病监测的机构是A.医疗机构
颞下颌关节脱位,口内法复位的用力方向是A.向下、后、上 B.向前、上、后 C
(2008年真题)出租人根据承租人对出卖人、租赁物的选择,向出卖人购买租赁物,提
最新回复
(
0
)