房间隔缺损在临床上最常见的类型是（）
A.下腔型
B.卵圆孔型
C.上腔型
D.原发孔型
E.静脉窦型缺损
参考答案：B
_____ at the seaside! [ ]
A. How fun the children had
B. What a fun the children had
C. How fun had the children
D. What fun the children had
交替脉提示（）
A.心律失常
B.心包积液
C.左心功能不全
D.脉压增大
E.脉压下降
