单项选择题

A material subjects to a deformation under force and can go back to its original shape. We call the material undergoes an elastic deformation.

A.正确
B.错误
<上一题 目录 下一题>
热门 试题

单项选择题
The existence of point defects，impurity atoms, dislocations，grain boundary may all hinder the dislocation movement, hence weaken the materials
A.正确
B.错误
单项选择题
In Polymers, bonds inside the long chain molecules are secondary bonding, bonds among the chains are covalent bonding
A.正确
B.错误
相关试题