Right now, they’re focusing on two materials of trees. The first material is cellulose, which can make energy. Lignin, the second material, can store that energy, just as a battery does. The team has found when pressed, cellulose can produce electricity. (他的团队一直致力于用森林制造电子...
Modern paper-making began in China about 2,000 years ago. This process produced paper from cloth, straw, wood or the bark of trees. The raw materials are struck over and over until they become loose. Then they are mixed with water. After the water has been removed, the flat, thin ...
People tend to use trees for papermaking.But maybe electronics (电子) engineers are missing out on something here. "It turns out that two major building blocks of wood have a lot of electrical qualities," says Magnus Berggren,a professor at Linköping University.His team has been working to...
This process produced paper fromcloth, straw, wood or thebark of trees. The raw materials are struckover and over until they become loose.Then they are mixed with water. After the water has been removed, the flat, thin form remaining is permitted todry. This becomes a sheet of paper....
Wood fibers derived from trees are the most employed sources for papermaking purposes. From an environmental protection perspective, and for their essential role in our life (they give us the life itself through their foliar system supporting the photosynthesis process...
In those days, paper was made from strips条状)of the papyrus(纸莎草)plant.Modern paper-making began in China about twothousand years ago. This process produced paper fromcloth, straw, wood or the bark of trees. The raw mate-rials are struck over and over until they become loose.Then ...
Modern paper-making began in China about two thousand years ago. Thisprocess produced paper from cloth,straw,wood or the bark of trees.The raw materials (原料)are struck over and over till they become loose. Then they are mixedwith water. After the water has been removed, the flat, thin...
13. Unlike ordinary paper-making where trees need to be cut down, Dai paper is environmentally friendly.This is because_its raw material is the recyclable bark of a kind of trees unique to the area. 相关知识点: 试题来源: 解析 答案见上13.because像 需要 , 傣纸是环保的。 这是因为它的原...
The process of papermaking can be divided into two methods: hand-made papermaking and machine papermaking. Both methods have common steps: raw materials, pulp, filtering, and drying. The basic steps of hand-made papermaking are as follows:Raw material preparation: Obtain raw materials such as ...
百度试题 结果1 题目Trees can be used as one of the raw (材料;原料) for paper-making.相关知识点: 试题来源: 解析 materials 反馈 收藏