首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The Stone Age, the Iron Age. Entire epochs have been named for materials. So what to call the decades ahead? The choice will be
The Stone Age, the Iron Age. Entire epochs have been named for materials. So what to call the decades ahead? The choice will be
admin
2016-01-05
24
问题
The Stone Age, the Iron Age. Entire epochs have been named for materials. So what to call the decades ahead? The choice will be tough. Welcome to The Age of Superstuff. Material science—once the least sexy technology—is【C1】______with new, practical discoveries led by superconducting ceramics(超导陶瓷)that may revolutionize electronics. But superconductors are just part of the picture: from house and cars to cook pots and artificial teeth, the world will someday be made of different stuff. Exotic plastics, glass and ceramics will shape the future just as surely as have genetic engineering and computer science.
The key to the new materials is researchers’ increasing ability to【C2】______substances at the molecular level. Ceramics, for example, have long been limited by their brittleness. But by minimizing the microscopic【C3】______that cause it, scientists are making far stronger ceramics that still retain such qualities as hardness and heat resistance. Ford Motor Co. now uses ceramic tools to cut steel. A firm called Kyocera has created a line of ceramic scissors and knives that stay sharp for years and never rust or【C4】______
A similar【C5】______has overtaken plastics. High-strength polymers now form bridges, ice-skating rinks and helicopter rotors. And one new plastic that generates electricity when vibrated or pushed is used in electric guitars, touch sensors for robot hands and karate jackets(空手道外衣)that automatically record each punch and chop. Even plastic litter, which once threatened to【C6】______blot the landscape, has proved amenable to molecular tinkering. Several manufacturers now make biodegradable forms; some plastic six-pack rings for example, gradually decompose when exposed to sunlight. Researchers are developing ways to make plastics as【C7】______as metal or glass. Besides, composites—plastic reinforced with fibers of graphite or other compounds—made the round-the-world flight of the voyager possible and have even been proved in【C8】______: a helmet saved an infantryman’s life by deflecting two bullets in the Grenada invasion.
Some advanced materials are old standard with a new twist. The newest fiberoptic cable that carry telephone calls cross-country are made of glass so【C9】______that a piece of 100 miles thick is clearer than a standard window pane.
But new materials have no impact until they are made into products. And that transition could prove difficult, for switching requires【C10】______research and investment. It can be said a firmer handle on how to move to commercialization will determine the success or failure of a country in the near future.
A)lengthy I)transparent
B)transformation J)deliberately
C)absorption K)bestow
D)bursting L)imperfections
E)combat M)recyclable
F)permanently N)neutralization
G)appreciable O)corrode
H)manipulate
【C3】
选项
答案
L
解析
由下文的scientists are making far stronger ceramics that stillretain such qualities as hardness and heat resistance可推知,空格所在部分的意思应为:但是通过把引起易碎性的微观缺陷最小化……故L)imperfections“缺陷,缺点”为答案。
转载请注明原文地址:https://jikaoti.com/ti/Z06FFFFM
0
大学英语六级
相关试题推荐
Newsisbadforyou—andgivingupreadingitwillmakeyouhappierA)Inthepastfewdecades,thefortunateamongushaverecogn
Itcouldbepossibletolearnnewskillswhileyousleep,accordingtoAmericanscientists.ResearchersatYaleUniversityinves
Itcouldbepossibletolearnnewskillswhileyousleep,accordingtoAmericanscientists.ResearchersatYaleUniversityinves
AslongastheAmericanlandwasnotcompletelysettledandtheelementsof【B1】______orderwerenotyetimposedonthefrontier,
ApowerfulearthquakestruckanareanearthenortherncoastofChileonWednesday.Theearthquakecameadayafteranevenstro
TheAmericaneconomicsystemisorganizedaroundabasicallyprivate【B1】______.It’smarket-orientedeconomyinwhichconsumersde
TheAmericaneconomicsystemisorganizedaroundabasicallyprivate【B1】______.It’smarket-orientedeconomyinwhichconsumersde
A)TheSupremeCourtunambiguouslyruledWednesdaythatprivacyrightsarenotsacrificedto21stcenturytechnology,sayinguna
AfricanEconomicGrowthA)GoodnewsforAfrica,saytheexperts.Growthishealthyandbroad-based,fuelledinpartbyinfrastru
AfricanEconomicGrowthA)GoodnewsforAfrica,saytheexperts.Growthishealthyandbroad-based,fuelledinpartbyinfrastru
随机试题
有关肱骨外上髁炎,下列哪几项是不恰当的
房屋交换时,以所交换房屋的评估价格作为契税的计征依据。[2008年考题]()
填石渗沟、管式渗沟和洞式渗沟均具有的结构有()。
某固定资产折旧年限为20年,采用年数总和法可得该固定资产第3年的年折旧率为(),用双倍余额递减法可得固定资产第3年的年折旧率为()。
下列关于事业单位会计要素的表述中,不正确的是()。
在专项救助社会工作中,社会工作者能够介入的工作是()。
拉开易拉罐汽水的拉环时,听到“啵”的一声,并有气体自汽水中冲出。有关此现象的说明,下列说法正确的是()。
生产关系有狭义和广义之分。狭义的生产关系是指在直接生产过程中结成的相互关系,包括生产资料所有制关系、生产中人与人的关系和产品分配关系。广义的生产关系是指人们在再生产的过程中结成的相互关系,包括生产、分配、交换和消费等诸多关系在内的生产关系体系。狭义和广义的
如果一个并发调度的结果与某一串行调度执行结果等价,则这个并发调度称为( )。
Believeitornot,opticalillusion(错觉)cancuthighwaycrashes.Japanisacaseinpoint.Ithasreducedautomobilecrashe
最新回复
(
0
)