首页
登录
职称英语
In the early 1950s the researchers who produced the first clad glass opt
In the early 1950s the researchers who produced the first clad glass opt
游客
2023-10-16
13
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 0.8μm 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
claim“提出,宣告”。这里应该用claim的现在分词作后置定语表示正在进行的动作。
转载请注明原文地址:https://tihaiku.com/zcyy/3103715.html
相关试题推荐
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
DeborahKenny’s"BorntoRise"TellsStoryofHarlemVillageAcademiesA
PeoplearenowbuyingeverythingovertheWeb--notjustbooksandCDs.Online
Therearemanykindsoflibrariesintheworld.Andwecouldborrowbookso
[originaltext]Objectsthatarevibratingmakesounds.Rhythmicsoundvibrations
CT成像的物理基础是A.计算机图像重建技术 B.像素的分布与大小 C.窗口技
某主板上市公司2016年5月9日召开董事会审议通过非公开发行股票决议,5月10日
不收取销售服务费的,对持有持续期少于7日的投资人收取不低于( )的赎回费,并将
A.肠毒素B.溶血素C.内毒素D.卵磷脂酶E.TSST-1霍乱弧菌的致病因素是
下列各句,哪一句的表述最连贯?()A.只要肯约束自己的贪欲,把欲望减少到最低限
建国后为了尽快普及小学教育,我国采取了两个基本方针,其一是坚持“”的办学方针
最新回复
(
0
)