_______ is good _______ your health. [ ]

A. Do eye exercise, for

B. Doing exercise, for

C. Do eye exercises, to

D. Doing eye exercises, to

髋关节后脱位时，患肢呈现的典型畸形是（）

A.患肢缩短，髋关节呈屈曲、内收、内旋畸形

B.患肢缩短，髋关节呈屈曲、外展、外旋畸形

C.患肢增长，髋关节呈过伸畸形

D.患肢增长，髋关节呈外展、外旋畸形

E.髋关节呈过屈畸形