妊娠眩晕的常见病机有
A．气血虚弱
B．瘀血内扰
C．肝肾阴虚
D．气郁痰滞
E．肾阳不足
参考答案：A,C,D
Someone is ringing the doorbell. Go and see__________ [ ]
A. who is he
B. who he is
C. who is it
D. who it is
ISO9000：2005品质管理之八大原则是什么？
