首页
登录
职称英语
Glass fibers have a long history. The Egyptians made coarse fibers by 1600 BC
Glass fibers have a long history. The Egyptians made coarse fibers by 1600 BC
游客
2023-12-22
18
管理
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. [br] Why was there nothing written about the making of Renaissance glass fibers until the seventeenth century?
选项
A、Glassmakers were unhappy with the quality of the fibers they could make.
B、Glassmakers did not want to reveal the methods they used.
C、Few people were interested in the Renaissance style of glass fibers.
D、Production methods had been well known for a long time.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3296283.html
相关试题推荐
Glassfibershavealonghistory.TheEgyptiansmadecoarsefibersby1600BC
Glassfibershavealonghistory.TheEgyptiansmadecoarsefibersby1600BC
Glassfibershavealonghistory.TheEgyptiansmadecoarsefibersby1600BC
Glassfibershavealonghistory.TheEgyptiansmadecoarsefibersby1600BC
Glassfibershavealonghistory.TheEgyptiansmadecoarsefibersby1600BC
Americaissaidtohavethemostsuccessfuleconomicsysteminhistory.But
Americaissaidtohavethemostsuccessfuleconomicsysteminhistory.But
Americaissaidtohavethemostsuccessfuleconomicsysteminhistory.But
Americaissaidtohavethemostsuccessfuleconomicsysteminhistory.But
______isthefirstimportantgovernessnovelintheEnglishliteraryhistory.A、
随机试题
NuclearWeaponReport[originaltext]Inareportcarr
SavingfortheFuture-Purposeofsaving1.Womensavea.fortheirchildren’
Theageatwhichyoungchildrenbegintomakemoraldiscriminationsaboutha
小张,男,28岁,吸烟12年,每日吸烟20~25支。因家中有小孩考虑戒烟,但自己
A.春 B.夏 C.长夏 D.秋 E.冬属于"金"的季节是()
2016年江苏农业生产经营人员1270.87万人。其中女性645.40万人,苏南
可溶性抗原定量测定常用的方法是( )。A.免疫印迹法 B.ELISA(夹心法
可用于蛛网膜下腔麻醉,但易出现过敏的局麻药是A.普鲁卡因B.利多卡因C.丁卡因D
慢性肺源性心脏病的症状加重主要由于A:呼吸道感染 B:过度劳累 C:摄入钠盐
A. B. C. D.
最新回复
(
0
)