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is an elastomer having physical cross-links in “network” structure.
is an elastomer having physical cross-links in “network” structure.
A.NR
B.SBS
C.SIS
D.NBR
正确答案:SBS;SIS
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材料导论
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The repeating units on the copolymer chain may be arranged in various sequences along the backbone chain, including:
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In comparison with PE,()is or are correct.