4. The result of the polymerization is small pieces of raw material polylactic acid plastic which can be converted into an array of PLA plastic products. What are the benefits of PLA products? PLA requires 65% less energy to produce than traditional, petroleum-based plastics. It also emits 68...
百度试题 结果1 题目14.塑料对环境有害,所以我们最好少用塑料制品。Plastic is harmful to the environment,so we' d better use plastic less. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
the brand new and improved PLA (Plastic-Lactic-Acid) Material. This green material, biodegradable PLA, comes from natural cornstarch which consists of normal plastic properties but without any negative effects from petroleum components. The carbon dioxide emission is 40% less than petroleum plastic!
Since PLA is a bio-based and biodegradable polymer, one might assume that the material is suitable for home composting, but this is generally not the case due to the high temperatures required for biodegradation. However, the compostable plastic can be sent to an industrial composting facility. ...
. The average drinking water consumption in Italy has been estimated in 1.5 liters per day, corresponding to three 500 ml-plastic bottles and 1 refillable aluminum bottle. LCA has been firstly applied to a single bottle production and use, then to the daily and annual bottles consumption. PET...
小题1:细节题:从第一段的句子:Plasticis everywhere because plastic is an extremely useful material.可知塑料很受欢迎,从第二句话Itis cheap, strong and lightweight. What's more,it can take on nearly any form or shape, from soft and stretchy(有弹性的) to hard and glasslike.可知讲的是塑料的...
【解析】给出的单词“much许多,many:许多”分析所给句子,根据第一个空后面的plastis(不可数名词,塑料)和系动词is(是)得知主语是不可数名词,用too much(太多)形容词,much后面接不可数名词,Too much plastic(太多的塑料)作主语,is(是)作系动词,bad(adj.有坏处的),for the earth(对地球)作状语。分析第二个...
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1、什么是聚乳酸(What is polylactic acid)(a) PLA polylactic acid polylactic acid (Poly lactic PLA history acid) a new biological plastic material exergy as early as 1932 Dupont scientist Wallace Carothers in a vacuum will produce lactic acid polymer with low molecular weight polymerization exergy ...
【题目】 Plastic is easy, convenient, cheap and long-lasting, but it does great harm to the env ironment.Since plastic entere d mass production, 8 billio n tons have been produced-an d we aren't very goo d at recycling. By 2015, 6, 945 tons o f pla stic waste h a d formed,...