类风湿性关节炎病变最初发生在()
A.关节内韧带
B.关节软骨
C.关节滑囊
D.关节囊纤维层
E.关节骨关节面
参考答案:C
The mother told her son _____ in the street. [ ]
A. not play
B. to not play
C. doesn't play
D. not to play
妊娠期急性阑尾炎可出现的症状有()
A.发热
B.恶心
C.视物模糊
D.头痛
E.呕吐