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
2024-08-16
7
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/3722447.html
相关试题推荐
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
Gettingteenagerstopayattentiontothedirtylaundryontheirbedroomflo
Concerningmoneyoranythingelse,conflictsbetweenhusbandandwifeusuall
ThefamilyisthecenterofmosttraditionalAsians’lives.Manypeopleworr
“顿悟”关系是学习迁移的一个决定因素。迁移不是由两个学习情境具有共同成分、原理而
将运算放大器直接用于两信号的比较,如图a)所示,其中,ua=-1V,ua的波形由
属于选择性5-羟色胺重摄取抑制剂的药物是A.苯妥英钠 B.阿普唑仑 C.舒必
下列属于二级动火区的有()。(A)动火地点有可能火花飞溅落至易燃易爆物体附近
某大型商业综合体,建筑设计单位不按照消防技术标准强制性要求进行消防设计,根据《消
嫉妒情绪的特点包括()A.针对性 B.持续性 C.对抗性 D.集
(2018年真题)单位合并后一方存续其他方解散的,各单位的会计档案应由存续方统一
最新回复
(
0
)