子宫颈外形恢复至非妊娠状态于产后（）
A.1周
B.2周
C.4周
D.6周
E.10周
参考答案：A
I could hardly recognize your son. ________ I met him， he was only a little child.[ ]
A．From the moment
B．For the first time
C．The first time
D．At the moment
手持行灯的电压有什么规定？
