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
2023-10-17
53
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] 【C3】
选项
答案
publication
解析
从下句的this publication可知答案为publication。
转载请注明原文地址:https://tihaiku.com/zcyy/3106982.html
相关试题推荐
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
Universalizationofeducationhasbeenapolicypriority,butitstillrema
Durablegoodslikehigh-definitionplasmaTVslastlongerthanatypicalfa
下列关于吊索及附件安全技术要求,说法正确的是A.吊索的绳环或两端的绳套应采用编插
患儿男,6个月。因反复发生惊厥、低血糖、肝大,血气分析示代谢性酸中毒,怀疑糖原累
以下不是心病的共有症状的是A、心烦心痛 B、心悸怔忡 C、失眠多梦 D、健
与发行普通债券相比,利用可转换债券筹资的主要优点有( )。[2008年中级真题
2006-80.用消积导滞的方法治疗腹泻,属于 A.热者寒之B.寒者热之C
关于信用衍生工具,下列论述正确的是()。A:主要品种包括信用互换、信用联结票据、
中性点不接地系统中,正常运行时,三相对地电容电流均为15A,当A相发生接地故障,
民用建筑的开发方、投资方以外的主体投资建设的公共电信配套设施,该设施的所有人和合
最新回复
(
0
)