心浊音界向两侧扩大，且随体位改变（）
A．左心衰竭
B．右心衰竭
C．心包积液
D．二尖瓣狭窄
E．主动脉瓣关闭不全
参考答案：C
能以理论作指导，对历代作家作品进行辨证的艺术批评的是（）。
—Good evening. I ______ to see Miss Jessie. —Oh! Good evening. I'm sorry, but she is not in.
A. came B. comeC. have come D. had come
