简述子宫收缩乏力的诊断。
有一直齿园柱齿轮，m＝4，Z＝36，它的齿高为（） ["4","9","5","10"]
某月经周期正常规律的孕妇，目前怀孕36周，孕期进展顺利，胎儿的情况大致是身长约是（） ["30cm","35cm","40cm","45cm","50cm"]
某月经周期正常规律的孕妇，目前怀孕36周，孕期进展顺利，胎儿的情况大致是体重大于（） ["500g","1000g","1500g","2000g","2500g"]
保安器座板正面有（），与保安单元对应。 ["故障信号灯","故障信号铃","告警信号铃","二极管"]
产后出血
