急性化脓性骨髓炎最常见的致病菌是()
A.溶血性链球菌
B.白色葡萄球菌
C.金黄色葡萄球菌
D.肺炎双球菌
E.大肠埃希菌
参考答案:C
The number of people present at the meeting _______ two hundred and a number of them _______ from the countryside.
A.is, are
B.is, is
C.are, are
D.are, is
现有一批烧结矿,其TFe分析结果为56.90%,已知TFe标准值为56.50%,如以TFe进行判断,该批烧结矿为()。
A、一级品
B、二级品
C、出格品