问题
单项选择题
原发孔型房间隔缺损的心电图常表现为()
A．电轴右偏，不完全性右束支传导阻滞
B．右心室肥厚
C．P-R间期延长
D．电轴左偏，左心室肥大
E．P波高尖
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
原发孔型房间隔缺损的心电图常表现为()
A．电轴右偏，不完全性右束支传导阻滞
B．右心室肥厚
C．P-R间期延长
D．电轴左偏，左心室肥大
E．P波高尖
参考答案：D
| Month | Average Price per Dozen |
| April | $1.26 |
| May | $1.20 |
| June | $1.08 |
as many dozen were sold in April as in May, and twice as many were sold in June as in April, what was the average price per dozen of the eggs sold over the three-month period