—Is the woman            walked past just now your teacher?         

—Yes. She teaches           _ English.      [ ]

A. that, our  

B. who, us  

C. whom, us  

D. who, our      

腱索断裂的直接征象是（）

A.二尖瓣回声改变

B.左室扩大

C.左房扩大

D.二尖瓣反流

E.连枷样运动