until very recently it was possible to use only natural materials of various kinds for the making of clothing. both plants and animals supply these natural materials.
from plants we get cotton and linen. from animals we get such materials as wool, silk, leather, and furs. modern man now has cloth which is made synthetically. in 1884 the first artificial fiber was made, called artificial silk, rayon, nylon and dacron are best-known products developed later.
2017届高考英语一轮复习课件:选修6 Module 4《Music》(外研版)
2016届高考英语阶段效果检测:31(含解析)
2016届高考英语阶段效果检测:30(含解析)
2017届高考英语一轮复习课件:第12讲 发挥合理想象,灵活阐释开放作文 写作素能培养(外研版)
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2017届高考英语一轮复习课件:选修7 Module 1-2《Basketball & Highlights of My Senior Year》(外研版)
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2017届高考英语一轮复习课件:第8讲 审清题意紧扣主语,迈出成功第一步 写作素能培养(外研版)
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2016届高考英语阶段效果检测:33(含解析)
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