直肠肛管周围脓肿中哪种是临床上最常见的()
A.坐骨肛管间隙脓肿
B.骨盆直肠间隙脓肿
C.肛管括约肌间隙脓肿
D.肛门周围脓肿
E.直肠后间隙脓肿
参考答案:D
In April, 2009, President Hu inspected the warships in Qingdao, _____ the 60th anniversary of the
founding of the PLA Navy.
A. marking
B. marked
C. having marked
D. being marked