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
2023-07-01
32
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
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/2798640.html
相关试题推荐
[originaltext]WeddingsintheUnitedStatesvaryasmuchasthepeopledo.
[originaltext]WeddingsintheUnitedStatesvaryasmuchasthepeopledo.
EndangeredPeoplesA)Today,itisnotdistance,butcult
EndangeredPeoplesA)Today,itisnotdistance,butcult
EndangeredPeoplesA)Today,itisnotdistance,butcult
EndangeredPeoplesA)Today,itisnotdistance,butcult
EndangeredPeoplesA)Today,itisnotdistance,butcult
[originaltext]M:Doyouthinkyoungpeoplearegiventoomuchfreedomnowadays,
Chinesepeoplehavetheirownculturewhenitcomestogivinguniquebabygi
Manyyoungpeoplebelievegoodgrades,excellentinternshipswilllandthem
随机试题
Differentthingsusuallystandfordifferentfeelings.Red,forexample,is
在CT扫描前需要大量饮水的检查部位是A.膀胱 B.肾脏 C.肺 D.肝胆
下列各项关于审计机关权限中,凡是涉及管理、分配、使用公共资金、国有资产、国有资源
有关血栓闭塞性脉管炎的治疗,下列哪项是错误的A.应用高压氧治疗,增加肢体供氧量
男,14个月,因发热1天,抽搐1次而就诊。无呕吐及腹泻,发热当时39.5℃,抽搐
营业收入审计目标包括()。A:收入真实性B:收入完整性C:收入分类正确性D
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
以下不属于鸡血藤的主治证的是A.肢体瘫痪 B.月经不调 C.风湿痹痛 D.
下列标石格式,可指示接头位置的是( )。
下列哪个是焊缝表面不允许存在的缺陷()。A.表面气孔 B.咬边 C.砂
最新回复
(
0
)