— Have you heard that Susan has been appointed Director of the Engineering Department?

— After working so hard for so many years, ____. [ ]

A. she surely welcomes it

B. she certainly deserves it

C. she is welcomed to it

D. it' s good news

关于心脏解剖和生理的论述，错误的是（）。

A.心肌血液供应主要来自主动脉起始处分出的两支冠状动脉

B.心脏传导系统包括窦房结、房室结、房室束及束支等

C.心肌受刺激后能引起反应，表现为机械性收缩和电生理的变化

D.等容收缩期是指半月瓣关闭至房室瓣开放这段时期

E.判断心脏收缩功能最常用的指标是射血分数