— Look at the bird over there! It’s so beautiful!

— Wow! It’s a rare crane. It          appears in this area.

A．always

B．usually

C．seldom

D．often

下列哪种情况与诊断心肌病无关：（）

A.无明显症状，心电图异常

B.患者有单独心房扩大和二尖瓣返流

C.无症状，X线检查心脏扩大

D.同时有左右心室充血性心衰

E.自觉乏力，劳力性呼吸困难