某空调系统采用全空气空调方案，冬季房间空调总热负荷为100kW，冬季室内计算温度为18℃，对室内相对湿度没有要求，需要的新风量为3500m³/h，冬季室外空调计算温度为-10℃，送风温差为10℃，冬季大气压力为1013kPa，空气的密度为1.2kg/m³，质量定压热容为1.01kJ/(kg·K)，热水的平均比热容为4.18kJ/(kg·K)。空调热源为80℃/60℃的热水，则该房间空调系统需要的热水量为（）kg/h。

A．5700～5800

B．6700～6800

C．7700～7800

D．8700～8800

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