A. 失去极性和对称性 B. 子宫持续呈紧张状态,间歇期,产妇呼痛不已 C. 胎儿宫内窘迫出现早 D. 宫口扩张及先露下降缓慢 E. 镇静剂有效
A. Logic View B. Use Case View C. Deployment View D. Component View