蚤类的灭效检查,需要在采取控制措施后()进行
A、12h
B、24h
C、48h
D、72h
参考答案:B
女性,40岁。诉头痛头晕,颈侧弯后伸后头晕加重并出现猝倒。肱二头肌腱反射亢进,颈椎斜位片显示钩椎关节增生。最大的可能是()
A.梅尼埃征
B.体位性眩晕
C.脊髓肿瘤
D.椎动脉型颈椎病
E.粘连性蜘蛛膜炎
—You speak very good French !
—Thanks . I __________ French in Sichuan University for four years.
A.studied
B.study
C.was studying
D.had studied