题目: 用胎头吸引术助产时,全部牵引时间不宜超过()。A.5minB.10minC.15minD.20minE.25min 答案: 参考答案:D解析:[考点] 胎头吸引术与产钳术的操作步骤及护理[重点等级] ★★★★