叙述膝关节功能活动范围。
参考答案：
中立位：膝关节伸直，髌骨向前。活动范围：屈曲145°，过伸15°；内旋10°，外旋20°（屈曲膝关节）。
It was a ______ he was born on his mother's birth- day. [ ]
A. accordance that
B. coincidence which
C. coincidence that
D. accordance which
政策学习是（）的一种形式。
A.工具学习
B.概念学习
C.集体学习
D.社会学习
