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.
六级考试暑期备考的改错练习(1)
六级考试完形填空提高练习(3)
六级考试完形填空提高练习(22)
六级考试长难句翻译练习(15)
六级考试完形填空提高练习(6)
六级考试高分备考的翻译练习(7)
六级考试完形填空提高练习(17)
六级考试长难句翻译练习(12)
六级完形填空最佳解题思路
六级考试完形填空提高练习(20)
六级考试长难句翻译练习(11)
六级考试高分备考的翻译练习(2)
六级考试高分备考翻译练习(4)
六级考试暑期备考的改错练习(16)
六级复习的改错七大备考公式
六级考试长难句翻译练习(9)
六级考试高分备考的翻译练习(8)
六级考试暑期备考的改错练习(10)
六级考试完形填空提高练习(26)
六级考试长难句翻译练习(7)
六级考试长难句翻译练习(10)
六级考试暑期备考的改错练习(4)
六级考试高分备考的翻译练习(10)
六级考试完形填空提高练习(1)
六级翻译题(9)
六级考试完形填空提高练习(5)
精讲六级翻译题(1)
六级考试完形填空提高练习(19)
六级考试高分备考的翻译练习(5)
六级考试完形填空提高练习(2)
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |