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【简答题】
一般的高聚物是化学组成相同,而相对分子质量不等和结构不同的同系物的混合物,即聚合物有两个多分散性,分别是()和()。
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相关题目：
【多选题】关于物流学科的性质，下列描述正确的有（）。
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【简答题】It is very important for people who drive cars 1 good driving habits. Don't drive too close to the car 2 you. Because if it stops, you may not be able to brake(刹车) 3 and then you may 4 it. If you want...
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