单项选择题

After vulcanization, there are still many carbon-carbon double bonds in the molecular chains of natural rubber.

A.正确
B.错误
<上一题 目录 下一题>
热门 试题

单项选择题
Additives are external substances purposely added to change properties of polymers or resins.
A.正确
B.错误
单项选择题
Thermosetting polymers have the distinct advantage of being chemically and thermally resistant materials used in many high-performance applications.
A.正确
B.错误
相关试题