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
2013-12-21
43
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.
【C9】
选项
答案
shifted
解析
shift指位置或方向的移动、改变;指由一种形式或用途改变为另一种形式或用途。
转载请注明原文地址:https://kaotiyun.com/show/yeVK777K
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
PassageTwoWhydosmartphoneusersgetdistractedwhenthehandsetisinsightaccordingtotheresearchers?
CriticalThinkingandInnovativeWritingThetraditionalwayofteaching.studentsareurgedto【T1】________things.
CriticalThinkingandInnovativeWritingThetraditionalwayofteaching.studentsareurgedto【T1】________things.
CriticalThinkingandInnovativeWritingThetraditionalwayofteaching.studentsareurgedto【T1】________things.
(1)Tosome,Facebook,Twitterandsimilarsocial-mediaplatformsaretheacme(顶点)ofcommunication—better,even,thanface-to-
(1)Tosome,Facebook,Twitterandsimilarsocial-mediaplatformsaretheacme(顶点)ofcommunication—better,even,thanface-to-
Itisbelievedthattheauthoritiesarethinkingof________newtaxestoraiseextrarevenue.
Wecannotformasoundopinionwithoutfacts,forweneedtohavefactualknowledge________ourthinking.
(1)Menandwomentendtochoosedifferentcareerpaths,andresearchershaveidentifiedthisasthebiggestreasonmenmakemor
随机试题
危害健康行为分为哪几类?
王某死亡时,遗产40000元。由其妻某甲和子某乙、某丙继承,当时,某甲已经怀孕,为胎儿保留继承份额10000元。胎儿出生后是双胞胎。问:如何对待以前的遗产分割结果。()
阴道清洁度检查结果为Ⅳ度,其中的白细胞(个/HPF)数应在
A.前置胎盘B.胎盘早剥C.子宫破裂D.胎膜早破E.脐带脱垂严禁肛门检查
无机性粉尘可分为矿物性粉尘、金属性粉尘、人工无机性粉尘。下列粉尘,属于人工无机性粉尘的是()。
根据成就目标理论,评价“成功”的标准有()。
领导交给你一项重要任务,但该任务需要同事帮忙才能完成,但同事也有事情要做,你会怎么说服他们帮你?
以下关于资本主义法律的表述,正确的是()
1920年,陈望道翻译的首个中文全译本《共产党宣言》在中国面世,立即受到工人阶级和先进知识分子的热烈欢迎,初版印了干余本很快销售一空。毛泽东后来回忆起他青年时代信仰马克思主义的经过时,曾谈及他在这个时期读过陈望道翻译的《共产党宣言》。1920年之所以会在中
在名称为Form1的窗休上添加一个名称为Label1的标签,字号大小为四号,标题为“等级考试”,如图1所示。通过设置属性使标签初始为不显示。请编写适当的程序,使得运行程序时,窗体的标题立即变为“标签”,单击窗体时,显示标签,如图2所示。注意:存盘时,将文
最新回复
(
0
)