题目内容
（请给出正确答案）
[单选题]
is an elastomer has physical cross-links in the “network” structure.
A.NR
B.SBS
C.SIS
D.NBR
提问人：网友udb8129
发布时间：2022-01-06
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A) NR
B) SBS
C) SIS
D) NBR
题目内容
（请给出正确答案）
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