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
18
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
SocialcircumstancesinEarlyModernEnglandmostlyservedtorepresswomen’
NumberSenseMan,eveninthelow
清水市国土资源局按照工作计划,拟集中在2018年6月办理几项资产采购业务(均达到
土地更正登记的法律特征不包括( )。A.已完成初始和变更土地登记 B.利害关
下面协议中,提供安全服务的是()。A.HTTP B.HTTPS C.FT
肺癌压迫上腔静脉可能出现A.同侧膈肌麻痹 B.声带麻痹声音嘶哑 C.面颈部、
在有关科学实践中,没有使用( )的仪器,经过( )的调查进行( )的论证往
2×20年9月20日,甲公司向其子公司乙公司销售一批商品,不含增值税的销售价格为
(2013年真题)根据《保险法》的规定,下列关于保险合同成立时间的表述中,
按照抗震要求,柱箍筋加密区的箍筋肢距的规定正确的是( )。A.一级不宜大于15
最新回复
(
0
)