对于膝关节骨关节炎的叙述,正确的是
A.负重较少
B.尽早行人工关节表面置换术
C.晚期可出现关节畸形
D.膝内翻时可行软组织松解
E.主要病变是关节滑膜的退行性变
参考答案:C
We all went out _____the lost boy. We had _____ everywhere, but didn't find him. [ ]
A. searching; searched
B. searching; searched for
C. in search of; searched
D. in search of; searched for
0.75L,在什么情况下出现?