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瞅了半天也没认出是啥。Polylactic acid (PLA) is a new bio-based and renewable biodegradable material, which is made of starch raw materials proposed by renewable plant resources (such as corn). Starch raw materials are saccharified to obtain glucose, then glucose and certain strains are fermented to produce high purity lactic acid, and polylactic acid with certain molecular weight is synthesized by chemical synthesis method. It has good biodegradability, can be completely degraded by microorganisms in nature under specific conditions after use, and finally generates carbon dioxide and water without polluting the environment, which is very beneficial to environmental protection and is recognized as an environment-friendly material. This thing is actually a long piece, and then "curled up" in it and wrapped in a cylinder shape. What's the use? You will see it in a short time.福尔摩师奶奇案序章　　闫护士长有些女强人的性格，精力旺盛，工作能力强。刀子嘴、豆腐心，也有点婆婆妈妈，爱给人介绍对象，爱买便宜东西。在爱情的选择上要求很高，对试想一下，一位古稀老人，每日里想的都是权谋和韬略，对心智的消耗是何其之大。你发什么呆？黄芽责备道。