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
39
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] 【C7】
选项
答案
Consequently
解析
此句成分完整,用表示因果关系的副词consequently以与上句的联系紧凑。
转载请注明原文地址:https://tihaiku.com/zcyy/3108981.html
相关试题推荐
Someresearchersfeelthatcertainpeoplehavenervoussystemsparticularly_____
(1)Menandwomentendtochoosedifferentcareerpaths,andresearchershav
(1)Menandwomentendtochoosedifferentcareerpaths,andresearchershav
Whatisatthetopofthelistofspeciesextinctions?[originaltext]Researchers
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
Whatisthepassagemainlyabout?[originaltext]Thedelicatematerialthatm
Forthispart,youareallowed30minutestowriteashortessayentitledMy
我国塔式高层住宅的平面形式中,T形、Y形、蝶形多用于北方地区,正十字形、井字形、
A. B. C. D.
下列原因中,不能据以调整设计概算的是( )。A.超出原设计范围的重大变更 B
毛泽东主席的《浪淘沙·北戴河》一词“东临碣石有遗篇”,“遗篇”指的是曹操的(
在风险预警运行过程中,要不断通过( )来检验其有效性。A.时间序列分析 B.
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
付款凭证只有在银行存款减少时才填制。()
最新回复
(
0
)