单项选择题
刚化原理提供了把变形体看作为刚体模型的条件。
A、正确
B、错误
刚化原理提供了把变形体看作为刚体模型的条件。
A、正确
B、错误
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单项选择题
During their college year, students don't grow in the aspect of ______.
During their college year, students don't grow in the aspect of ______.
A．learning to relate to family and friends in a new way
B．becoming more self-centered
C．developing new ways of grasping knowledge
D．establishing their sexual identity
单项选择题
A．1A
B．-1A
C．-5A
D．5A