初产妇胎膜未破，宫口扩张多少可在室内活动
A．5cm以内B．6cm以内C．7cm以内D．8cm以内E．9cm以内
参考答案：A
—__________?
—She is tall and thin. [ ]
A. What's Mrs Brown like
B. What does Mrs Brown have
C. What does Mrs Brown like
D. What does Mrs Brown look like
从理论上讲，探管机的线圈倾斜（）角度，可以估测管道的埋深。
A、30°
B、45°
C、60°
D、任意锐角
