下列目标中哪个最重要（）
A.交期
B.数量
C.服务
D.成本
E.质量
参考答案：E
These photos will show you .
A．what does our village look like
B．how does our village look like
C．what our village looks like
D．how our village looks like
三尖瓣关闭不全的概述
