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Glass transition related closely to molecular motions.
Glass transition related closely to molecular motions.
A.正确
B.错误
正确答案：正确
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材料导论
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Thermosets generally have better toughness or impact strength than thermoplastics.
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The formation of cross-linked structures in synthetic rubbers is usually called vulcanization. After vulcanization, there are still many carbon-carbon double- bonds in the molecular chains of natural rubber.