--- Hi, Tracy, you look tired.

--- I’m very tired. I ____ the living room all day.

A．painted

B．had painted

C．am painting

D．have been painting

主动脉-冠状动脉旁路移植术的适应症不包括（）。

A.左冠状动脉主干病变狭窄>50％

B.有轻度室性心律失常伴左主干或3支病变

C.稳定型心绞痛对内科药物治疗反应不佳，影响工作和生活

D.冠状动脉3支病变伴左心室射血分数<50％

E.左前降支和回旋支近端狭窄≥70％