"粘膝征"阳性见于（）。
A.后脱位
B.前脱位
C.中心脱位
D.陈旧性脱位
E.习惯性脱位
参考答案：A
I wonder ______ you were doing last night.
A．it was what that
B．what was it that
C．that what it was
D．what it was that
下列疫苗中为减毒活疫苗的是（）
A.百白破疫苗
B.乙型脑炎疫苗
C.钩体菌苗
D.乙型肝炎疫苗
E.风疹疫苗
