安装临时假肢的最佳时机是（）
A.截肢手术结束后
B.伤口愈合
C.截肢术后2周
D.截肢术后3个月
E.截肢术后半年
参考答案：A
What the doctors really doubt is ____ my mother will recover from the serious disease soon. [ ]
A.when
B.if
C.whether
D.what
构架由（）、（）组成的焊接结构，呈H型。
octors really doubt is ____ my mother will recover from the serious disease soon. [ ]