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
32
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/3719705.html
相关试题推荐
Whatisatthetopofthelistofspeciesextinctions?[originaltext]Researchers
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
MargieappliedtoCentrelinkforNewstart,butgivingthecouplehavehadvariou
CompletethesummarybelowusingNOMORETHANTWOWORDSfromthepassage.Write
[originaltext]W:HeyMiguel,how’veyoubeenlately?M:Stressed.Ihavetodo
根据《证券市场资信评级业务管理办法》,下列说法中正确的有()。A.资信评级
甲公司为集成电路生产企业,适用的所得税税率为25%,2016年实现利润总额为20
审计人员发现被审计单位的存货实物盘点数量超过账簿记录数量,其可能的原因是()A
下列说法中错误的是()。A:证券公司在开展证券经纪业务营销时,可以营销本公司提供
解表清里剂常用中成药葛根芩连丸的功能是A.解表化湿,理气和中 B.解表通里,清
板式塔的内件安装程序,正确的是()。A.吊装就位→内件安装→找平找正→灌浆
施工单位竣工验收的准备工作不包括()。A.整理汇总档案资料,全部立案归档 B
最新回复
(
0
)