The palace caught fires three times in the last century,and little of the original building   now.

A．remains

B．is remained

C．is remaining

D．has been remained

系统性红斑狼疮患者出现何种表现提示病情危重、预后不良（）

A.肺部感染

B.胸膜炎

C.心包炎

D.中枢神经系统损害

E.急腹症