His father, who is said to be teaching in Australia, ____ in Nanjing University for more than 10 years.

A．has worked

B．had worked

C．worked

D．has been working

急性化脓性腹膜炎手术治疗的指征（）

A.腹腔内病变严重

B.盆腔器官感染引起的腹膜炎

C.腹膜炎严重，无局限趋势而病因不明者

D.病人一般情况差，中毒症状严重，有休克表现

E.经12小时保守治疗，腹膜炎症状加重者