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
23
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/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
Howmanytimeshaveyouheardtheexpressionthatmostpeoplespendmoretim
TheConceptofStyleStylemaybedefinedasthecharact
某交易者以0.0106(汇率)的价格出售10张在芝加哥商业交易所集团上市的执行价
湿热腰痛,治宜A.甘姜苓术汤 B.独活寄生汤加附子 C.四妙丸 D.
内生肌酐清除率测定是反映A.近端肾小管排泌功能 B.远端肾小管排泌功能 C.
下列选项中,符合所给图形的变化规律的是:
(2010年真题)下列关于赠与人享有撤销赠与权利的表述中,不正确的是()。A.赠
下列各项中,企业应计入外购存货采购成本的有()。A.入库前的挑选整理费
机坪安全线标志包括()。A.信息标志 B.行人步道线标志 C.机位安全线
根据《建设工程工程量清单计价规范》(GB50500-2013),企业在投标报价时
最新回复
(
0
)