It is not enough only ______the rules of grammar if you want to learn English well.

A．keeping in the mind

B．to keep in mind

C．to keep in your mind

D．keeping in your mind

下列哪种体征不在右心功能不全时出现（）

A.肝大

B.下肢水肿

C.Kussmaul征

D.腹水

E.肝颈静脉回流征