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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.3. The three platforms of Interface and Finance Association, including Interface News, Blue Whale Finance and Finance Association, will all win the award list, which will be publicized and broadcast on large screens in the offices of Beijing and Shanghai.李敬文道：刚才听小葱说，山子他们在后边玩水，怎么背起书来了？葫芦心就柔软起来，道：去看看。8. MDT team needs to have a good data management mechanism, which can not only save medical data for patients, but also be used for management and research.《I:LOVE:DM》讲述接受私信投稿代替苦恼代替恋爱商谈的I艺高广播部校园爱情网剧。轻易不敢请书院的人来家吃饭的，尤其是我家。剧情承接《铁甲狂猴之亡命雷霆》，雷霆击败力霸与铁刹之后，苍穹又派出了更为致命的博士与银狐来追杀雷霆，雷霆逐个击破。最终雷霆重新拾起铁甲狂猴的正义使命，与苍穹展开了最终大战。