--You don't look so well, Mary. What's the matter with you?

--Why?___________.

A．I'm quite myself

B．Fine, think you

C．I felt bad

D．I'm not myself

不是心力衰竭代偿机制的是（）

A.Frank-Starling机制

B.心肌肥厚

C.交感神经兴奋性增强

D.RAS激活

E.心肌耗氧增加