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
2018-01-27
48
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.
【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://kaotiyun.com/show/aXNK777K
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
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
Childrenareinventinganewlexiconforelectroniccommunicationwitharangeofjargonandsymbolsthatadultsfindhardtou
—David.It’sgoodtomeetyou.______—Threeyears,butI’mthinkingaboutstoppingsoon.—Why’sthat?—It’stimeforachange,
Thetermcultureshockwasintroducedforthefirsttimein1958todescribethe【D1】______producedwhenapersonmovestoaco
随机试题
影响观察客观性的主观因素有_________的偏见、无意过失、假象与错觉。
地神祭祀
学校工作的全面安排必须以()。
下列关于骨架片的叙述中,哪一条是错误的
肾上腺素的临床应用包括()。
路基土的稠度是划分路基干、湿类型的指标。()
评估对象是报废机器设备本身,其拆零后的某些部件尚可使用且存在变现价值,该报废设备评估结果的价值类型应当选择()。
德国心理学家艾宾浩斯研究发现,遗忘是有规律的,一般是()。
77个连续自然数的和是7546,则其中第45个自然数是()。
法的历史类型的划分标准是()。
最新回复
(
0
)