新生儿娩出后首先应
A．断脐
B．擦洗新生儿面部
C．清理呼吸道
D．刺激新生儿足部
E．抓紧娩出胎盘及胎膜
参考答案：C
在等式( )3÷[(-2xyz)2-2x4y3z]=y中括号内应填入( )
A．8x6y5z3
B．8x2y2z
C．2x2y2z
D．±2x2y2z
I _____ in Shanghai since I was a child. [ ]
A. used to live
B. lived
C. have lived
D. live
