A mordant is a substance that is used to make a dye bond to the fabric or yarn. It ‘sets’ the color. The majority of natural dye materials require a mordant to set dye but there are a few exceptions such as black walnuts which are colorfast by themselves. Mordants can also be used...
答案 The best materials are coloured using natural dyes, made from plants.译句:最好的布是由从植物中萃取的天然染料染色的.希望能够帮助到你!O(∩_∩)O相关推荐 1The best materials are coloured using natural dyes,made from plants.翻译 反馈
根据第一段第一行的“Clothes are traditionally made of natural materials, such as cotton, leather and wool. They are all from plants or animals,传统上的衣服是由棉花、皮革和羊毛等天然材料制成的。它们都来自植物或动物”可知,传统的服装材料来自植物和动物,故答案应为C。2、【答案】D【解析】问:通过...
Natural products obtained from various plant materials including terrestrial plants play an important role in chemistry of drugs. They provide amazing..Mamta BhattacharyaArchana SinghChhaya Ramrakhiyani
根据前文“The need to conserve resources often conflicts with other needs.(节约资源的需要常常与其他需要相冲突)”以及后句“A timber (木材) company may want to harvest the area's trees for construction materials.(木材公司可能想要收获该地区的树木作为建筑材料)”可知,此处是在举例说明保护和发展间的冲...
阅读短文.从A.B.C三个选项中选出最佳答案回答问题或完成句子.Clothes are traditionally made of natural materials, such as cotton, leather and wool. They are all from plants or animals, but that doesn’t mean they’re friendly to the earth. For example, farme
Dependent onnatural resourcesfor food, materials, and fuel, all societies face the prospect of shortages or “running out” from time to time. Regional, national, and planetary resource inventories have been the stock in trade of applied resource geography since the birth of the discipline. Despit...
aMedicinal raw materials are derived from natural medicinal materials, including fresh or simply-processed plants, animals and minerals which are intended for applications in disease treatment, health-care or the production of medicines. Medicinal plants and animals are the main object of pharmacognosy,...
1.根据Clothes are traditionally made of natural materials, such as cotton, leather and wool. 可知答案。 2.根据Scientists have worked out how to make materials out of corn husks( 棉籽 ), chicken feathers and rice straws.可知答案。 3.根据Chicken feathers are better than other things. They have...
Petroleum-based plastics are useful but they pose a great threat to the environment and human health. It is highly desirable yet challenging to develop sustainable structural materials with excellent mechanical and thermal properties for plastic replacem