下列病因中可引起中心性发绀的是
A．肺水肿
B．渗出性心包炎
C．缩窄性心包炎
D．血栓性静脉炎
E．上腔静脉综合征
参考答案：A
The foreign friends you referred to________looking forward to________around the university. [ ]
A. being; being shown
B. are; being shown
C. being; showing
D. are; be shown
判断休克患者微循环效能较可靠的依据是（）
A.血压
B.脉搏
C.呼吸
D.神志
E.尿量
