输血最常见的并发症是 ( )
A．发热反应B．溶血反应C．过敏反应D．细菌污染反应E．循环超负荷
参考答案：A
The lawyer listened with full attention,（）to miss any point.
A. not trying
B. trying not
C. to try not
D. not to try
二尖瓣关闭不全的杂音传导方向是（）
A.向颈部传导
B.向心底部传导
C.向心尖部传导
D.向左腋下部传导
E.向剑突下传导
