肺炎并发脓胸最常见的病原体是
A．肺炎双球菌B．溶血性链球菌C．金黄色葡萄球菌D．大肠杆菌E．铜绿假单胞菌(绿脓杆菌)
参考答案：C
应进一步做何检查
A．肌电图
B．脑电图
C．腰穿
D．头MRI
E．胸部MRI
—Coco is from New York. She is ____________ American school girl. [ ]
A. /
B. a
C. an
D. these
