关于抑郁症患者中双相障碍的危险因素,下列说法错误的是()
A.产后抑郁
B.青少年起病
C.一级亲属中有抑郁症的家族史
D.伴精神病性症状
E.环性人格特征
参考答案:C
----Would you mind if I turned off the light?
----____________.
A.Yes, go ahead
B.No, please don’t
C.Go ahead, please
D.Certainly, do as you please
如何进行实验室加标回收率试验?