出现病理性缩复环最常见的情况是（）。
A.子宫畸形
B.子宫收缩乏力
C.强直性子宫收缩
D.骨盆出口狭窄
E.臀位
参考答案：C
—Could you please show me how to get to the furniture store?
— Sure, _____ the escalator to the second floor, _____ left and you'll see it. [ ]
A. sit, take
B. catch, turn
C. take, turn
叩出Damoiseau曲线时应存在
A．蜂窝状积液
B．中等量积液伴胸膜黏连
C．少量积液
D．中等量积液无胸膜增厚、黏连
E．大量胸腔积液
