结果1 题目【题目】 阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。What are microplastics(塑料微粒) and where do they come from? Every year, there are mill ions of tons of microplastic particles【小题1】(introduce ) to our oceans. T he【小题2】 (an alyse)of this ...
What that does, is burn the polymer away, and fuse the silicon nano particles together, while maintaining the structure of pores. But that's possible only on materials that can withstand high heat. Glass? Yes. Plastics? No. But they're working on solving that problem, trying to come up ...
plastics are synthetic polymers constructed from lengthy chains of carbon and other elements in our atmosphere. Through industrial processing techniques, oil and gas are converted into hydrocarbon monomers, then combined with certain chemicals to achieve the desired strength...
Substances like polythene and polyvinyls are commonly called plastics. They are usually addition vinyl polymers. They are familiar for their flexibility and softness. Substances added to plastics to impart viscosity, flexibility and other properties to
A new investigation by National Public Radio (NPR) and the Public Broadcasting Service (PBS)reports that the large oil and gas companies that manufacture plastics have known for decades that recycling plastic was unlikely to ever happen on a broad scale because of the-high costs involved. "They...
While traditional plotters are not typically used for 3D printing, there are specialized plotters known as 3D plotters or 3D printers that can create physical objects layer by layer. These devices use additive techniques to build 3D models using materials such as plastics, resins, or powders. Unli...
Plastics come in a wide variety of forms and can be used in a variety of manufacturing applications. ABS is one of the most widely used types of plastic. What is ABS plastic? Acrylonitrile Butadiene Styrene, also known as ABS plastic, is an amorphous, opaque thermoplastic material. It is ...
for example. They've been banned everywhere because they are so bad for the environment and wildlife. Furthermore, beginning in 2021 the European Union will ban single-use plastics.(3)___; we also need to change consumers' habits by changing the way they think about single-use plastics. ...
And, whether or not the packaging is of the appropriate size, several types of materials have traditionally been used for a single parcel: for example, tape, cardboard boxes, styrofoam padding and bubble wrap. Many of these packaging materials are composed of plastics. In...
W: Hi, I hear you are looking for volunteers for the Green Community Project. Could you please tell me more about it? M: Sure,this project focusesmainlyon environmental problems caused by plastics. Our organization plans to help the community improve its plastic recycling system. ...