男，2岁。双侧先天性髋关节脱位，最佳的治疗方案是（）
A.手术切开复位
B.牵拉复位
C.髋臼成形术
D.手法复位+蛙式石膏固定
E.连衣袜套
参考答案：D
---Excuse me, could you tell me _______________________?
--- It will leave at 3:00 p.m.
A．when will the plane leave for Shanghai
B．when the plane will leave for Shanghai
C．how will you go to Shanghai
D．how you will go to Shanghai
试述电子政务发展的社会背景。
