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
53
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
【C8】
选项
答案
E
解析
由空格后的a helmet saved an infantryman’s life by deflecting twobullets in the Grenada invasion“在格林纳达的战斗中,该头盔使两颗子弹偏斜,从而保住了一个步兵的性命”可推知,用石墨纤维或其他合成物强化的合成塑料在战争中经受了考验,故E)combat“战斗,战争”为答案。
转载请注明原文地址:https://kaotiyun.com/show/dZQ7777K
0
大学英语六级
相关试题推荐
Newsisbadforyou—andgivingupreadingitwillmakeyouhappierA)Inthepastfewdecades,thefortunateamongushaverecogn
A、Raisingthepricesofpetrol.B、Increasingthepricesofcars.C、Reducingtheparkinglots.D、Changingpeople’sattitude.D对话中
Foryears,scientistshavebeenstudyinghowmusicaffectsthebrainanditsfunctions.Classicalmusic,【B1】______songsbyMoza
Angerisanemotionthatcanbedifficulttodealwith.Sometimesit’sexperiencedasafleeting【B1】______whileothertimesitc
ApowerfulearthquakestruckanareanearthenortherncoastofChileonWednesday.Theearthquakecameadayafteranevenstro
Afterdecadesofstaringatapes,FransdeWaalhaswrittenabookaboutwhathumansseewhentheywatchchimpanzees.Thesecrea
A、Fastcurrentssweepawaythewreckagecausedbyterribleweather.B、Themagneticpowerdrawthemdowntotheoceanbottom.C、S
Here’sawarningfromhealthexperts:Sittingisdeadly.Scientistsareincreasinglywarningthatsittingforprolongedperiods
HorsemanshipReturnedA)Bridgeport,Calif.Themenemergedoverthecrestofaridgeandguidedtheirhorsesalongatreeline,
CeaseFireinUkraineA)SeparatistleadersinUkraineagreedMondaytojoinagovernmentdeclaredceasefireasafirststeptow
随机试题
疏散通道上的防火门应向疏散方向开启,关闭后手动开启时只能从内侧手动开启。()
Supposewebuiltarobot(机器人)toexploretheplanetMars.Weprovidetherobotwithseeingdetectorstokeepitawayfromdange
A.慢性阻塞性肺气肿B.大叶性肺炎C.原发性肺结核D.中叶综合征E.肺栓塞可以发生Ⅱ型呼吸衰竭的是
统计指标按其反映的内容或其数值表现形式,可以分为总量指标、相对指标和()。
《公司法》规定了不得担任公司董事、监事、高级管理人员的情形,其中包括()。
根据税收征收管理法律制度的规定,下列各项中,不属于纳税主体义务的是()。
下列选项中,属于仲裁协议应当包括的内容有()。
教学内容:探索并证明“圆周角定理”(学生知识基础:已经学习了圆心角、圆周角的概念)撰写要求:1.只要求写出探索和证明两个环节的教学设计片段;2.说明每个教学环节的设计意图;3.简述两个教学环节中渗透了哪些重要的教学思想方法.
老李给自家院子搞绿化,从院门口左边开始,贴着院墙每隔米种紫叶矮樱,每隔米种金叶榆,每隔米种龙爪槐,每隔8米种银杏,种完发现只有起点和终点(即院门口两边)四种植物重合种在一处,则院墙周长()米。
下列描述中正确的是
最新回复
(
0
)