首页
登录
职称英语
The Stone Age, the Iron Age. Entire epochs have been named for materials. So
The Stone Age, the Iron Age. Entire epochs have been named for materials. So
游客
2023-08-21
42
管理
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 [br] 【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:http://tihaiku.com/zcyy/2943364.html
相关试题推荐
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
TheStoneAge,theIronAge.Entireepochshavebeennamedformaterials.So
随机试题
WhyDoWeNotLiveForever?Thehumanbodyiscomposednotofpe
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeli
CreativeThinkingI.Factstobeknownaboutcreativethi
Timeis,fortheaverageAmerican,ofutmostimportance.Tothe【B1】______vis
某企业年末流动资产为1500万元,非流动资产为3500万元,所有者权益为3000
关于火灾自动报警系统组件的设置,下列说法不正确的是()。A.民用建筑内扬声器数量
上市公司申请发行新股必须具备的条件有()。A:公司股东在近3年内没有重大违法行
下列关于无固定期限劳动合同的说法中,错误的有( )。A、对无固定期限的劳动合同,
投资者持有面值1亿元的债券I,利用中金所国债期货TF合约对冲利率风险,TF合约
商业银行的现金资产包括( )。A.库存现金 B.存款准备金 C.向中央银行
最新回复
(
0
)