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I have a notebook made of PP. What does "PP" stand for? A. Polypropylene B. Polyethylene C. Polyvinyl Chloride D. Polyester 相关知识点: 试题来源: 解析 A。“PP”是“Polypropylene”的缩写,意为聚丙烯。“Polyethylene”是聚乙烯,“Polyvinyl Chloride”是聚氯乙烯,“Polyester”是聚酯。
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What Is PTFE Fabric? PTFE stands for polytetrafluoroethylene, which is a type of synthetic polymer called a fluoropolymer. A fluoropolymer is a type of polymer that consists of carbon and fluorine molecules, and the main constituent of polytetrafluoroethylene is tetrafluoroethylene (TFE), which ...
Suede is a type of leather, and it can be derived from any type of animal skin that is used in the production of normal leather. The main difference between suede and other types of leather is that suede fabric is derived from the underside of animal ski
Polysyndeton is the use of repeated conjunctions between words or clauses in a sentence to emphasize what’s being said. The word polysyndeton, pronounced poly-syn-de-ton, comes from the Ancient Greek word polysyndetos, which means “bound together.” Writers use polysyndeton to emphasize words...
Polyester is a category of polymers that contain the ester functional group in every repeat unit of their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). 2 Polyethylene Polyethylene or polythene (abbreviated PE; IUPAC name polyethene ...
PMMA is an important material for many other medical procedures. For instance, it is used to make dentures and fillings because it is easy to dye and quick to form. As a result, doctors can use PMMA material to make dentures and fillings that closely match the size and color of the orig...
Epigenetic memory is defined as the maintenance of gene expression states through cell generations in the absence of the initiating signals. PREs were first discovered in flies, in which they can mediate epigenetic memory of both silent and active states of their associated genes. Epigenetic memory ...