肾盂肾炎最常见的致病菌为
A．溶血性金黄色葡萄球菌B．绿脓杆菌C．大肠杆菌D．厌氧杆菌E．变形杆菌
参考答案：C
The little child ________ get what he wanted at last and felt very happy.
A．tried to
B．failed to
C．managed to
D．succeeded to
抗生酮作用
