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What are the characteristics and advantages of plastic packaging boxes

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answer:
Topic 1: Manufacturing (characteristics) of plant plastics and the value (advantages) of their products. (just be close) (2 points)
Topic 1: it is natural to write about the hazards of petroleum products from known to unknown, which is easy to be accepted by readers (or it is natural to write so as to show the necessity of the birth of new products) (2 points); Compared with plant plastics, it can highlight the value (advantages) of new products. (2 points) (just feel close)
④: introduction to the production process of polylactic acid plastics (paragraph 1). This is written according to the order of development of things, which is in line with people’s cognitive law (2 points).
Sub topic 1: Examples & nbsp; Compare & nbsp; (2 points) objective: to illustrate more clearly the application advantages of biodegradable characteristics of plant plastics in medicine with examples; By comparison, it is more powerful (more prominent) to explain the characteristics of plant plastic degradation and its application value in medicine. (2 points)
Subtopic 1: it can’t be removed (1 point). The “about” accurately indicates the fact that the price changes up and down by 50%. If it is removed, it will be determined as 50%, and there is no floating, which is inconsistent with the fact (2 points). (just close)

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