首页
登录
职称英语
In the early 1950s the researchers who produced the first clad glass optical
In the early 1950s the researchers who produced the first clad glass optical
游客
2023-10-18
58
管理
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. [br] 【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://tihaiku.com/zcyy/3107442.html
相关试题推荐
Icebergsareafavoritesubjectforphotographersbecauseof______producedbyth
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
Thechild’sbadbehaviorisoftenmorethanawayoftryingto______hismother’s
Allflights______becauseoftheterribleweather,theyhadtogotherebytrai
Inmanycountries,authorityisseldomquestioned,eitherbecauseitishigh
胸膜腔内的压力是由下列哪个因素形成的()。A.大气压-非弹性阻力 B.肺内
劳动合同法第三十条第二款规定了用人单位拖欠或者未足额发放劳动报酬的,劳动者可以依
公民小朱年满16周岁,并以自己的劳动收入为主要生活来源,可以视为:A.限制民事行
某市2010年全年实现农业增加值124.3亿元,比上年下降1.6%。粮食播种面积
患者,女性,63岁,诊断为支气管哮喘急性发作,使用布地奈德、沙丁胺醇吸入、氨茶碱
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
按照建设工程监理制度规定,必须实行建设工程监理的工程范围的有( )。A.国家重点
最新回复
(
0
)