与氨性氯化锶试剂反应生成沉淀，提示该黄酮分子结构中具有（）
A.酚羟基
B.5--羟基
C.3--羟基
D.7--羟基
E.邻二酚羟基
参考答案：E
All of the following are characteristics of the project management information system(PMIS)EXCEPT:
A．It is a standardized set of automated tools available within the organization and integrated into a syste
B．It is used by the project management team to support generation of the project management plan, facilitate feedback as the document is developed, control changes to the project management plan, and release the approved documen
C．It is used by the project management team to monitor and control the execution of activities that are planned and scheduled in the project, management pla The PMIS is also used to create new forecasts as neede
D．It is used by the project management team primarily to generate presentations to key stakeholder Typically, a separate, manual system is used for the integrated change control process, to facilitate feedback and control changes across the projec
93号汽油中的93表示（）。
