肝硬化腹腔积液产生的机制不包括（）。
A.门静脉内压增高
B.血清清蛋白减少
C.肾小球滤过减少
D.醛固酮分泌增多
E.脾功能亢进
参考答案：E
Great changes __________ in China in the past few years.
A． were taken place
B． took place
C． have been taken place
D． have taken place
人民代表大会制度的核心内容和实质是：
A．工人阶级领导
B．国家的一切权力属于人民
C．国内各民族一律平等
D．少数服从多数
