Both the family and the society ________ exceptional children live are often the key to their growth

and development. [      ]

A. which  

B. what

C. in which  

D. that

下列情况为应用洋地黄的适应证的是（）

A.高度房室传导阻滞，心功能Ⅳ级

B.肥厚型梗阻性心肌病，心功能Ⅱ级

C.预激综合征伴心房颤动及急性左心衰竭

D.急性心肌梗死24小时后发生室率过快的心房颤动

E.重度二尖瓣狭窄伴窦性心动过速及急性肺水肿