感染性结石
参考答案：感染性结石 通常是指能分解尿素的细菌感染所形成的六水磷酸镁铵、磷酸钙和铵的结石。其他各种尿石并发梗阻和感染后，均可以形成感染性结石。
Which of the following statement related to PMO is not correct ( )
A．The specific form, function, and structure of a PMO is dependent upon the needs of the organization that it supports.
B．One of the key features of a PMO is managing shared resources across all projects administered by the PMO.
C．The PMO focuses on the specified project objectives.
D．The PMO optimizes the use of shared organizational resources across all projects.
一个文件的扩展名通常表示
A．Visual FoxproB．PowerPointC．五笔、拼音D．WordE．文件的类型
