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
2024-08-14
36
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] 【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://tihaiku.com/zcyy/3719706.html
相关试题推荐
Shakespeareproducedmostofhisknownworkbetween1589and1613.Hisearlypla
WhatdidresearchersatHarvardfindinthestudy?[br][originaltext]Inthiss
WhatdidresearchersatHarvardfindinthestudy?[br][originaltext]Inthiss
WhatdidresearchersatHarvardfindinthestudy?[br][originaltext]Inthiss
WhatdidresearchersatHarvardfindinthestudy?[originaltext]Inthissection
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
Insportthesexesareseparate.Womenandmendonotrunorswiminthesam
Highstreetshopsuseavarietyofmeanstoattractshoppers,suchasstriki
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpainting
小肠吸收的物质中,主要以被动形式吸收的是()A.水和钾 B.钙和钠 C.糖
某高速公路沥青路面表面层AC-13,采用3种规格石灰岩粗集料,分别10mm-15
父母去世后、老夏把未成年的弟弟抚养成人,老夏夫妇育与一子一女,均已结婚生子、生活
以下6个图形为正方体的外表面展开图,其中3个图形组成的正方体相同,另外3个图形组
某企业客户已开立基本存款账户,因贷款需要在某商业银行新开立账户,该账户不必支取现
A公司向B企业购买一批原材料,开出一张票面金额为60万元的银行承兑汇票。出票日期
患者男性,40岁,确诊肝炎后肝硬化10年,2小时来患者出现呕血及黑便,并逐渐表现
最新回复
(
0
)