首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
In the early 1950s the researchers who produced the first clad glass optical fibers were not thinking of using them for communic
In the early 1950s the researchers who produced the first clad glass optical fibers were not thinking of using them for communic
admin
2021-03-10
46
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.
【C4】
选项
答案
cited
解析
句意为:这篇文章发表的日期经常被人们称为光纤通信时代的起始日。cite和日期之间是动宾关系,动作发出者是人们,故用cite的被动语态cited。
转载请注明原文地址:https://kaotiyun.com/show/VmAK777K
本试题收录于:
C类竞赛(非英语专业本科)题库大学生英语竞赛(NECCS)分类
0
C类竞赛(非英语专业本科)
大学生英语竞赛(NECCS)
相关试题推荐
TheLondontoBrightonCarRunThefirstLondontoBrightonruntookplaceonNovember14th,1896.Itwas【21】org______tocel
TheLondontoBrightonCarRunThefirstLondontoBrightonruntookplaceonNovember14th,1896.Itwas【21】org______tocel
Thereisdistinctionbetweenreadingforinformationandreadingforunderstanding.【B1】______Thefirstsenseistheonein
Livinginaforeigncountryisfun,butitisn’talwayseasy.Therearemanydifferencesbetweenculturesandalthoughsomeof
Polarbearsaresufferingina【C1】______(warm)worldthaneverbefore.Polarbearsliveinenvironmentstoocoldformostani
ThroughEnglishwewillbeabletocommunicate______partoftheworldwecomefrom.
ThefollowingitemshavebeendestroyedEXCEPT________.
somepeoplepreferworkoractivitiesthatmainlyinvolveworkingwithpeople.Otherschooseworkoractivitiesthatmainlyinvo
Alanguageisasystemofsounds,gestures,orcharactersusedbyhumanstocommunicatetheirideasandfeelings.Thereareabou
Diamondisthehardestnaturallyoccurringsubstanceknown.Itisthemostpopulargemstoneandbecauseofitsextreme【C1】_____
随机试题
行政复议决定书邮寄送达的,以()为送达日期。
某基坑的地基土层分布如图1—3所示,地下水位在地表以下0.5m。其中第①、②层的天然重度γ=19kN/m3,第③层淤泥质土的天然重度为17.1kN/m3,三轴固结不排水强度指标为:ccn=17.8kPa,φcu=13.3°。如在第③层上部取土样,在其有效
在饮用水地表水源准保护区内以下行为属于被禁止的是()。
什么是社会评价的定量分析法?
设总体X~P(λ),则来自总体X的简单随机样本X1,X2,…,Xn的样本均值的概率分布为___________.
已知ξ1=(0,0,1,0)T,ξ2=(一1,1,0,1)T是齐次线性方程组(Ⅰ)的基础解系,η1=(0,1,1,0)T,η2=(一1,2,2,1)T是齐次线性方程组(Ⅱ)的基础解系,求齐次线性方程组(Ⅰ)与(Ⅱ)的公共解.
FluShotsOrNot?ItsoundedlikeagoodideawhenNewYorkCity’smayor,RudollphGiuliani,advisedNewYorkersrecentlyto
Ifthetechnologicalrevolutioncontinuestohaveitseffects,therewillbefewerandfewerjobsavailable,particularlytosch
ThestateofMichigannowrequiressportsfanstomakeanannual______of$125to$500aseattokeeptheirendzoneperchesat
Thelocalgovernmentwillgrandlandto____________(那些愿意建厂的人).
最新回复
(
0
)