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
20
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] 【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://tihaiku.com/zcyy/3103717.html
相关试题推荐
Whatisatthetopofthelistofspeciesextinctions?[originaltext]Researchers
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
[img]2022m3x/ct_ve01202001m_eillist_0587_220329[/img][br][originaltext]NowI’
根据《统计法》规定,统计人员独立行使的职权是( )。A.统计调查、统计报告、统
患者女,30岁,因关节痛就医。实验室检查发现其血清ANA,RF均升高。 关于A
Ⅲ型异型淋巴细胞是指哪种细胞A.浆细胞型B.单核细胞样型C.幼淋巴细胞样型D.原
房地产抵押合同的特征表现在()。A:它生效后,对抵押具有限制性 B:它所设立
(2020年真题)某消防安全重点单位开展消防设施和器材检查,根据现行国家标准《建
英国保守党党魁亲自在广告中招揽年轻人。工党设有青年工党全国委员会,并在2005年
A每个图分别由4个不同的部分构成,而其角和脚又分别为1或2或3,只有A符合。
(2016年真题)下列民事法律事实中,属于法律行为的是( )。A.甲将购物卡8
A.连续点 B.可去间断点 C.无穷间断点 D.振荡间断点
最新回复
(
0
)