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
2024-08-16
12
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/3721576.html
相关试题推荐
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
道教(Taoism)是中国土生土长的宗教,已经影响了中国人两千多年。道教有三个起源,最古老的是“黄帝”(YellowEmperor)传说。第二个来源是
Stressiswithusallthetime.Itcomesfrommentaloremotionalactivitya
根据资产评估法的规定,评估协会是评估机构和评估专业人员的()。A.民间组织
2020年,F省全年粮食产量502.32万吨,比上年增加8.42万吨,增长1.7
(2021年下半年真题)未成年人丹丹的父母外出打工,一定期限内不能完全履行对丹丹
关于慢性纤维空洞型肺结核的叙述,哪些项是正确的? A.肺内可为一个空洞B.肺
QDII基金在我国()设立,从事()投资。A.境内;境内 B.境内;境外 C
20世纪70年代以来,全球投行业务发展的重要方向是()。A.中介类业务 B.用
下列垄断行为中,行为人可能承担刑事责任的是()。A.行业协会促成经营者达成垄断
属于Ⅱ类β肾上腺受体拮抗剂的药物是A、胺碘酮 B、普罗帕酮 C、维拉帕米
最新回复
(
0
)