In the past few cotton years, the consumption of cotton mills in China is much larger than that in China. Cotton yield 。 Therefore, China's cotton stocks are decreasing year by year, and cotton imports are increasing year by year. In the face of the shortage of raw materials, the domes...
下面题目使用的数据表如下： 当前盘当前目录下有数据库：学院．dbc，其中有“教师”表和“学院”表。 有SQL语句： SELECT学院．系名，COUNT(*)AS教师人数 FROM 教师，学院； WHERE 教师系号=学院．系号GROUP BY学院．系名 与如上语句等价的SQL语句是 ...
著名史学家王家范先生曾经精辟地指出：“小农经济一锄、一镰(或者再加上一犁，不是家家都有畜力，那就用人力拉犁)，一个主要劳力加上一些辅助劳力，一旦和土地结合，就可以到处组织起简单再生产。”对这段话的理解，最正确的是（）
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A. The production process may affect water safety. B. The clothing cost is relatively low in China and India. C. Cotton clothes are buried because they are hard to break down. D. The use stage is the least E. nvironmentally harmful of the F. ive stages. ...
Eco-fashion is about making clothes that take into account the environment, the healthof consumers and the working conditions of people in the fashion industry.1_Firstly, the production of textiles(纺织品) pollutes the environment heavily. Cotton-planting usespesticides(杀虫剂); sheep-farming and ...
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How is Angora wool fabric made? At its best, the production of Angora wool consists of a respectful, sustainable relationship between human and rabbit. The Angora wool production process involves a few distinct steps: 1. Cultivation of Angora fur Most breeds of Angora rabbits produce full ...
Secondly,every stage of clothing production has a significant effect on the environment. They all use a great deal of energy,and some also involve chemicals which evidently do harm to the surroundings. In addition to this,there is a lot of waste produced in the process,especially in the form...
A solvent spinning technique is used to create Tencel, which means that unlike the case in the production of rayon, the Tencel production process doesn't cause any significant chemical changes to the chemical structure of cellulose. While fabrics derived from cellulose have been around for nearly...