Fans crowded the street outside, ______ a look at their hero.

A．waiting for

B．waited for

C．to wait for

D．to be waiting for

扩张型心肌病的最主要特征是

A．心肌收缩期泵功能衰竭

B．心肌舒张期泵功能衰竭

C．呼吸困难

D．附壁血栓

E．心房纤颤