最常见的先心病是（）
A.房间隔缺损
B.室间隔缺损
C.动脉导管未闭
D.肺动脉瓣狭窄
E.法洛四联症
参考答案：A
What do you know about the man [A] He was not born in Beijing. [B] His parents like Beijing better than he does. [C] Beijing is the place where his parents were born.
不论是发包人提供的图纸，还是承包人负责设计的图纸，经过( )审核签认后才可以使用。
A．项目经理 B．设计单位负责人C．工程师 D．承包方技术负责人．
