题型:判断题 I was on the highway when this car went past followed by a police car. They ______ at least 150km an hour. [ ]A. should have been doing B. must have been doing C. could have done D. would have done 查看答案
题型:判断题 对于子宫下段,下列哪项是不恰当的?()A.子宫上下段肌壁薄厚不同,在产程中上下段交界处在子宫内面形成一环状隆起,称为生理性缩复环B.临产后子宫收缩极性的缘故,峡部被拉长形成子宫下段C.系由子宫峡部形成,非孕时长1cmD.下段为被动扩张段,随产程进展而变长变薄E.子宫下段常被产科医师选择作为剖宫产术子宫切开处 查看答案