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
2024-08-14
24
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] 【C8】
选项
答案
resolved
解析
resolve找到解决……的方法,与issues搭配,指一系列问题得到了解决。
转载请注明原文地址:https://tihaiku.com/zcyy/3719711.html
相关试题推荐
Whatisatthetopofthelistofspeciesextinctions?[originaltext]Researchers
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
随机试题
IncreasedScreenTimeandWellbeingDeclineinYouthA)Havey
FiveTipsforStudyingAmericanRevolutionAmericanRevolution—
设函数,则f’(x)的零点个数为A.A0 B.1 C.2 D.3
为了抑制通货膨胀,国家宏观调控部门可以采取的措施是: A.降低再贴现率B.降
导游服务是导游人员通过向游客提供劳务而创造特殊( )的劳动。A.社会价值 B.
A.驱杀绦虫,宜研末,用温开水送服 B.治疗疥癣,研末,用醋或猪脂涂患处 C
透邪解郁,疏肝理气的方剂是A.痛泻要方B.蒿芩清胆汤C.小柴胡汤D.四逆散E.半
骨与关节结核多继发于 A.肠结核B.肺结核C.肾结核D.淋巴结结核
外商间接投资是指除对外借款(外国政府贷款、国际金融组织贷款、商业银行商业贷款、出
5根弹簧系数均为k的弹簧,串联与并联时的等效弹簧刚度系数分别为()。A.
最新回复
(
0
)