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
2016-01-14
35
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.
【C2】
选项
答案
claiming
解析
现在分词作后置定语。
转载请注明原文地址:https://kaotiyun.com/show/r6NK777K
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
Fivehundredyearslater,theneedforincreasedtradeandanerrorinnavigation________toanotherEuropeanencounterwithAme
(1)TheUnitedStatesisfacingitsfirstmajorteachershortagesincethe1990s,onethatcoulddevelopintoacrisisforschoo
ThearchitectoftheWalkieTalkiebuildinginLondonhasadmittedthathepredicteditmightreflecthotsunraystothestreet
WhichofthefollowingsentencesisINCORRECT?
Iwantedtogotothefootballmatch,soI______fromtheoffice.Unfortunately,thebossfoundoutandtoldmetogethispermis
Changesinthewaypeoplelivebringaboutchangesinthejobsthattheydo.Moreandmorepeopleliveintownsandcitiesinste
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Ontheeveningofhis18thbirthday,ateenagerfromatinyvillagenorthernGermanyclicked‘send’onhiscomputer.Withinthre
ThespeakersaretalkingabouthowJeremypublishedhisnewbook.
______thenoteyouleft,Iwouldhaveforgottentoclosethedoor.
随机试题
SpeechforVisitorstotheMuseum1.Historyofthemuseum.Waterandavailabilityofrawmaterial—madethesitesuitab
RNA聚合酶全酶识别启动子的位置在
运用价值工程优化设计方案所得结果是:甲方案价值系数为1.36,单方造价1200元,重要系数0.3215;乙方案价值系数为1.28,单方造价1250元,重要系数0.2132;丙方案价值系数为1.15,单方造价1230元,重要系数0.2886;丁方案价值系数
我国执行的GB/T19001--2000质量管理体系标准中,质量管理原则包括八个方面,其中,将活动和相关资源作为过程进行管理,可以更高效地得到期望的结果体现了()的原则。
下列项目中,属于进口货物关税完税价格组成部分的是()。
在基础货币中,中央银行控制力最强的是()。
6枚一角硬币叠在一起与5枚五角硬币一样高,6枚五角硬币叠在一起与5枚一元硬币一样高。如果分别用一角、五角、一元硬币叠成三个一样高的圆柱,这些硬币的币值为87.元,那么三种硬币总共多少枚?
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
管理信息系统的功能可按应用划分若干层次,其中面向战术层的功能为
数据库设计的四个阶段是:需求分析、概念设计、逻辑设计和
最新回复
(
0
)