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A.正确
B.错误
The objective of vulcanizing rubber
A．To improve processibility
B．To increase hardness and chemical resistance
C．To reduce materials cost
D．To increase amorphousness
The government has lost a great deal of______because of the large increase in food price.
A．strength
B．support
C．agreement
D．vote
Highly oriented (rod-like) molecules that increase directional strength in polymers.______
A．Liquid-crystal polymers B．Linear polymers
C．Amorphous polymers D．Branched polymers
A.错误
B.正确
