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
2024-02-02
9
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://www.tihaiku.com/zcyy/3414906.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,
[originaltext]M:Doyouthinkyoungpeoplearegiventoomuchfreedomnowadays,
Chinesepeoplehavetheirownculturewhenitcomestogivinguniquebabygi
随机试题
HowExerciseMakesYouSmarterExercisedoesmorethanbu
以方格网道路系统为骨架,以城市广场为中心,体现市民民主文化的城市是下列的()
城中道路网不规则,没有森严城墙的古城是()。A.南京古城 B.西安古城 C.
心肌梗死时的附壁血栓属于()A.透明血栓 B.白色血栓 C.混合性血栓
下列对我国的地理特点说法不正确的一项是()。A.我国的地势特点为西高东低 B.
【电气设备及运行维护】35、变压器的温度升高时,绝缘电阻测量值()。 (
一项乙类工程位于甘肃地区某大河的三级阶地上,黄土厚30m左右,其下为中生代的砂页
转托管可使投资者于()日就可以在转入券商(新的托管券商)处卖出证券。A:T+0
关于对货币政策中介指标的基本要求的说法,错误的是()。A.相关性 B.可得性
下列有关工程监理单位勘察质量管理的主要工作描述不正确的是()。A.监理机构
最新回复
(
0
)