On my birthday last year, my wife bought me ______ expensive suit made of ______ wool.[ ]

A. a; /        

B. an; the          

C. an; /    

D. the; a

颌骨骨髓炎临床上通常是______感染

A．金黄色葡萄球菌

B．溶血性链球菌

C．肺炎球菌

D．大肠杆菌

E．混合性细菌