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
53
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 aspects of glass fiber does the passage mainly discuss?
选项
A、The major developments in its production.
B、Its relationship with pottery making.
C、Important inventors in its long history.
D、The variety of its uses in modern industry.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/3BSO777K
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
Howmuchphysicalactivityshouldteenagersdo,andhowcantheygetenough?Manyteenagersspendalot
Howmuchphysicalactivityshouldteenagersdo,andhowcantheygetenough?Manyteenagersspendalot
Howmuchphysicalactivityshouldteenagersdo,andhowcantheygetenough?Manyteenagersspendalot
Still,itwasnaturaltobeupsetwhensomeoneyouknowhasbeenbrutallymurdered.
CitingOhioordinancesthatallowindividualstoseekchargesagainstsomeonethey’veseencommitacrime,sevenEuclidresident
CitingOhioordinancesthatallowindividualstoseekchargesagainstsomeonethey’veseencommitacrime,sevenEuclidresident
Butstill:asrailtravelisdisrupted,thousandsofpeoplewillonceagainseethewithfuryattheoperatingcompanies’shortco
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindpeoplefinditdifficulttolearnthatsystemTheyar
A、History.B、Chemistry.C、Astronomy.D、Mathematics.D
随机试题
The"standardofliving"ofanycountrymeanstheaverageperson’sshareofthegoodsandserviceswhichthecountryproduces.A
肠原性青紫症选用氰化物中毒选用
心悸心虚胆怯证的代表方是()
【2012专业知识真题上午卷】按规范要求设计的变电室,下列哪一项室内电气设备外露可导电部分可不接地?()
报表管理和财务分析模块不可以从各模块取数编制相关财务报表,进行财务分析。()
计算投资项目的净现值可以采用实体现金流量法或股权现金流量法,下列关于这两种方法的表述中,正确的有()。
人民调解“四做法”叙述正确的是()。
2013年二季度,我国税收月收入同比增速逐步提高,分别为7.9%,8.3%和12.9%。截至2013年6月,全国税收总收入完成59260.61亿元,同比增长7.9%,较上年同期回落1.9个百分点。其中,国内增值税、企业所得税同比分别增长6.6%和14.2%
A、Peopledon’thavetoreleaseinformationinpublic.B、Itcanhelpthepolicetoestablishmanybasicfacts.C、Thepolicecanf
Theeurozone,whichhasadoptedtheeuroasitssolelegalcurrency,isnow15memberslargeandhasacombinedpopulationofa
最新回复
(
0
)