问答题
刚体转动实验仪载物台呈十字形，它沿半径方向等距离地排有三个小孔，这些小孔中可以安插小圆柱，用以改变体系的 。
刚体转动实验仪载物台呈十字形，它沿半径方向等距离地排有三个小孔，这些小孔中可以安插小圆柱，用以改变体系的 。
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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