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
37
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
YourtourinChinais【11】toaclose.WhenIfirstmetyou10daysago,wewe
若IF1512合约的挂盘基准价为4000点,则该合约在上市首日的涨停板价格为()点。A、4800B、4600C、4400D、4000A
龙胆根横切面最外保护组织为A.木栓层B.表皮C.后生皮层D.皮层E.下皮层
根据《基础测绘规划》,××市计划建设××市地理信息公共服务平台,主要任务是以现有
2011年T市完善价格补助联动机制使受益群众比上年约增加了:() A.78
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性: A.如
表中工业重复用水量高于工业新鲜用水量的行业有几个: A8 B9 C10
某单层独立地下车库,采用承台下桩基加构造防水底板的做法,柱A截面尺寸500mm×
人格是一个人在与社会相互作用过程中所形成的一个相对稳定的()系统。A.心理
纳税人将不动产无偿赠与他人,其纳税义务发生时间为不动产所有权转移的当天。()
最新回复
(
0
)