动脉压力曲线中呈现的重搏切迹相当于心动周期的哪一期()
A.快速充盈期
B.等容收缩期
C.快速射血期
D.减慢射血期
E.等容舒张期
参考答案:E
— Tod hadn't passed the exam and was afraid of being scolded.
— _____.
[ ]
A. So it was with Jim
B. So was Jim, his classmate
C. It's the same with Jim
D. Neither had Jim, his classmate
济南瑞蚨祥成立于1868年,是全国知名的百年老字号。民国初年,瑞蚨祥在北京开办了几处新店,同时在天津、青岛、烟台等地的分号也相继设立。这一时期,瑞蚨祥迅速发展的原因有( )
①欧洲列强暂时放松对中国的经济侵略
②南京国民政府采取一系列促进经济发展的政策和措施
③民众掀起提倡国货运动
④民族资产阶级政治地位有所提高
A.①②③④
B.②③④
C.①②③
D.①③④