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
In the early 1950s the researchers who produced the first clad glass optical fibers were not thinking of using them for communic
In the early 1950s the researchers who produced the first clad glass optical fibers were not thinking of using them for communic
admin
2018-01-27
53
问题
In the early 1950s the researchers who produced the first clad glass optical fibers were not thinking of using them for communications.【C1】H______, fiber optics was already a well-established commercial technology when the famous paper by Kao and Hockham,【C2】______ (claim)the use of low-loss optical fibers for communication, appeared in 1966. The first low-loss silica fiber was described in【C3】______which appeared in October of 1970. The date of this publication is sometimes【C4】______(cite)as the beginning of the era of fiber communication. Although this development did receive【C5】______(consider)attention in the research community at the time, it was far from inevitable that a major industry would evolve.
The technological barriers appeared formidable because there were serious doubts as to 【C6】wh______these fiber components could ever be produced economically enough, but the market potential was very significant.【C7】______(consequence), research and development activity expanded rapidly, and a number of important issues were【C8】re______during the early 1970s. During the middle and late 1970s, the rate of progress towards marketable products accelerated as the emphasis【C9】______(shift)from research to engineering. Fibers with losses【C10】 app______the Rayleigh limit of 2 dB/km at a wavelength of 0. 8 μm were produced.
By 1980 improvement in component performance, cost, and reliability led to major commitments on the part of telephone companies.
【C9】
选项
答案
shifted
解析
shift指位置或方向的移动、改变;指由一种形式或用途改变为另一种形式或用途。
转载请注明原文地址:https://kaotiyun.com/show/vXNK777K
本试题收录于:
C类竞赛(非英语专业本科)题库大学生英语竞赛(NECCS)分类
0
C类竞赛(非英语专业本科)
大学生英语竞赛(NECCS)
相关试题推荐
ThroughEnglishwewillbeabletocommunicate______partoftheworldwecomefrom.
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Thetermcultureshockwasintroducedforthefirsttimein1958todescribethe【D1】______producedwhenapersonmovestoaco
Thetermcultureshockwasintroducedforthefirsttimein1958todescribethe【D1】______producedwhenapersonmovestoaco
随机试题
有关肺顺应性的叙述,正确的是
海关事务担保
下面哪项检查是筛查早期宫颈癌的重要方法
关于输液(静脉注射用大容量注射液)的说法,错误的是()。
招标投标活动的基本原则体现在( )等方面。
组织绩效评估是指基于事实,有组织地、客观地对公共部门的雇员的特性、资格、能力、业务态度、工作适应性及对组织的贡献所作出的评估。()
二战全面爆发的标志性事件是日本制造卢沟桥事变。()
下列法律文件中,规定内阁对君主负责的是()。
(1)InaninterviewneartheendofhiscareerthefashiondesignerYvesSaintLaurentconfessedtoaregret:thathehadnotinv
A、Shehasgotadriver’slicense.B、Shewasacceptedbyacollege.C、Sheisgoingtoanothercountry.D、Shegotagoodjob.D从男
最新回复
(
0
)