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【单选题】
高分子聚合物的结构是( )
A.
原子数少，分子长度短，分子量小
B.
原子数很少，分子长度很长，分子量很小
C.
原子数很多，分子长度很长，分子量很大
D.
原子数很多，分子长度短，分子量很大
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