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
52
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.
【C3】
选项
答案
publication
解析
从下句的this publication可知答案为publication。
转载请注明原文地址:https://kaotiyun.com/show/aXNK777K
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.
—I’mthinkingofaskinghertomarryme.—Butyouonlymetherlastnight!—______—Yeah,right!
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Thetermcultureshockwasintroducedforthefirsttimein1958todescribethe【D1】______producedwhenapersonmovestoaco
随机试题
TheHappinessInstituteYoudon’tneedmillionstobehappy.AttheHappinessInstituteinAustralia,acoupleofhundredd
患者,男,62岁,进行性排尿困难,夜尿次数增多,直肠指诊发现前列腺明显肿大,最可能的诊断是
背景资料某光缆线路工程采用直埋敷设方式,途中需穿越生态环境脆弱的国家级生态保护区,部分路段沿电气化铁路敷设。施工单位对施工方案进行了策划,编制了详细的施工组织设计,工程顺利开工。测试中发现部分光缆对地绝缘不合格,且光纤接续衰减
构成投资组合的证券甲和证券乙,其标准差分别为12%和8%。在等比例投资的情况下,如果两种证券的相关系数为1,该组合的标准差为10%;如果两种证券的相关系数为-1,则该组合的标准差为2%。( )
国有文物不可以出境展览。()
制订课程计划的首要问题是()
19世纪波兰音乐最杰出的代表人物是()。
网络时代是一个“信息过剩而注意力稀缺”的时代,以网络为基础的当代经济的本质是“注意力经济”,在这种经济形态中,最重要的资源是注意力,因此在互联网上如何吸引注意力成为一个非常重要的问题。网络时代对注意力的经济价值的强调无疑是必需的,但如果忽视了对吸引注意力的
Dopeoplegethappierormorefoul-temperedastheyage?Stereotypesofirritableneighbors【B1】______,scientistshavebeentryi
域表达式{ab|R(ab)∧R(ba)}转换成为等价的关系代数表达式,所列出的式子中(47)是不正确的。SQL中集合成员资格的比较操作“元组NOT IN(集合)”中的“NOT IN”与(48)操作符等价。SQL中涉及属性AGE是甭是空值的比较操作,写法(4
最新回复
(
0
)