Nowadays students go to key universities just for a formal         , which may help them hunt for a

suitable job in the future.[ ]

A. conservation  

B. preparation  

C. graduation    

D. qualification

男性25岁，受凉后畏寒高热(39℃)伴咳嗽、胸痛 1天，胸片示右上肺大片状阴影，血WBC 21 ×10 ¹²/ L，中性粒85%诊为

A．干酪性肺炎

B．急性肺脓肿

C．支原体肺炎

D．肺炎球菌性肺炎

E．克雷白杆菌肺炎