I was worried about my maths, but Mr. Brown gave me an A.（）

A.Don't worry about it.

B.Congratulations! That's a difficult course.

C.Mr. Brown is very good.

D.Good luck to you！

下列哪项是鉴别右心衰竭与肝硬化的最主要依据（）。

A．腹水的程度

B．颈静脉是否充盈

C．有否全身水肿

D．有否肝脏肿大

E．有否脾脏肿大