真性主动脉瘤主动脉扩张，局部内径增大，常为相应正常部位内径的多少倍以上（）。
A.2
B.2.5
C.3
D.1.5
E.1
参考答案：D
When Nancy was at college, she ______ three foreign languages. But I am surprised to find that she ______ all except a few words of each.
A．spoke; had forgotten
B．had spoken; had forgotten
C．spoke; has forgotten
D．had spoken; has forgotten
肺脓肿的关键性治疗方法是( )。
A．抗菌和痰液引流B．支持疗法C．手术治疗D．处理原发灶E．对症治疗
