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
Glass fibers have a long history. The Egyptians made coarse fibers by 1600 BC, and fibers survive as decorations on Egyptian pot
Glass fibers have a long history. The Egyptians made coarse fibers by 1600 BC, and fibers survive as decorations on Egyptian pot
admin
2018-06-06
71
问题
Glass fibers have a long history. The Egyptians made coarse fibers by 1600 BC, and fibers survive as decorations on Egyptian pottery dating back to 1375 BC. During the Renaissance(fifteenth and sixteenth centuries AD, glassmakers from Venice used glass Line fibers to decorate the surfaces of plain glass vessels. However, glassmakers guarded their secrets so carefully that no one wrote about glass fiber production until the early seventeenth century.
The eighteenth century brought the invention of "spun glass" fibers. Rene-Antoine de Reaumur, a French scientist, tried to make artificial feathers from glass. He made fibers by rotating a wheel through a pool of molten glass, pulling threads of glass where the hot thick liquid stuck to the wheel. His fibers were short and fragile, but he predicted that spun glass fibers as thin as spider silk would be flexible and could be woven into fabric.
By the start of the nineteenth century, glassmakers learned how to make longer, stronger fibers by pulling them from molten glass with a hot glass tube. Inventors wound the cooling end of the thread around a yarn reel, then turned the reel rapidly to pull more fiber from the molten glass. Wandering tradespeople began to spin glass fibers at fairs, making decorations and ornaments as novelties for collectors, but this material was of little practical use: the fibers were brittle, ragged, and no longer than ten feet, the circumference of the largest reels. By the mid-1870’s, however, the best glass fibers were finer than silk and could be woven into fabrics or assembled into imitation ostrich feathers to decorate hats. Cloth of white spun glass resembled silver: fibers drawn from yellow-orange glass looked golden.
Glass fibers were little more than a novelty until the 1930s, when their thermal and electrical insulating properties were appreciated and methods for producing continuous filaments were developed. In the modern manufacturing process, liquid glass is fed directly from a glass-melting furnace into a bushing, a receptacle pierced with hundreds of fine nozzles, from which the liquid issues in fine streams. As they solidify, the streams of glass are gathered into a single strand and wound onto a reel.
Which of the following terms is defined in the passage?
选项
A、Invention.
B、Circumference.
C、Manufacturing process.
D、Bushing.
答案
C
解析
转载请注明原文地址:https://www.kaotiyun.com/show/DBSO777K
本试题收录于:
NAETI中级口译笔试题库外语翻译证书(NAETI)分类
0
NAETI中级口译笔试
外语翻译证书(NAETI)
相关试题推荐
Jimmywasjustatotallyordinary,honestbloke,theleastpretentiouspersonyoucouldeverimagine.Andhisaudienceadoredhi
Thenarratorseemsaninformedpersonwhotellsusaboutthecharactersandtheirrelations.
Howmuchphysicalactivityshouldteenagersdo,andhowcantheygetenough?Manyteenagersspendalot
Howmuchphysicalactivityshouldteenagersdo,andhowcantheygetenough?Manyteenagersspendalot
CitingOhioordinancesthatallowindividualstoseekchargesagainstsomeonethey’veseencommitacrime,sevenEuclidresident
Mariabecameincreasingly________,soshefledtoherhometowninAustria.
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindpeoplefinditdifficulttolearnthatsystemTheyar
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindpeoplefinditdifficulttolearnthatsystemTheyar
Coca-Colahasbeenoperatinginternationallyformostofits100yearhistory.Todaythecompanyhasoperationsin160countries
Coca-Colahasbeenoperatinginternationallyformostofits100yearhistory.Todaythecompanyhasoperationsin160countries
随机试题
工程师肖某取得建造师资格证书后,因故未能在3年内申请注册,3年后申请初始注册时必须()。
将软盘写保护后,不可以向该盘复制文件,但可以删除该盘上的文件。 ( )
在有关企业统计的表述中,下列提法不准确的是( )。
A、B、C共同出资设立甲有限责任公司,注册资本为2000000元,A、B、C持股比例分别为60%、25%、15%。则按照章程规定,A投资的金额为()元。
在散客的送站服务中,按照与游客约定的时间,导游必须提前30分钟到达游客下榻的饭店,协助游客办理离店手续。()
文艺复兴三杰为()。
定势是一种消极的心理活动准备状态。()
股票价值最大化的目标会与诸如避免不道德或违法行为等其他目标发生冲突吗?特别是,你是否认为像客户和职工的安全、环境和良好的社会等主题符合这一框架,或者它们本来就被忽视了?试着用一些具体情况来说明你的答案。
网络新闻标题与报纸新闻标题的异同。(南京大学2016年研)
公务员
最新回复
(
0
)