肩关节功能位为（）
A.屈曲20°
B.屈曲90°
C.背伸20°
D.旋前、旋后的中立位
E.外展50°，前屈20°，内旋25°
参考答案：E
The river, _______the bank are covered with trees, is very long.
A．whose
B．which
C．of which
D．which of
当归的功效是（）
A.补血
B.活血
C.大补元气
D.调经
E.润燥、滑肠
