— I’m leaving for Qingdao tomorrow.

—                                              

A．Congratulations!

B．I’m sorry to hear that.

C．You’re welcome!

D．Have a good trip!

胎儿出生后心血管系统的变化不包括（）

A.脐动脉和脐静脉闭锁

B.动脉导管闭锁

C.左、右心房完全分开

D.卵圆孔闭锁形成卵圆窝

E.膀胱圆韧带和肝圆韧带断开