【点击查看：2021年上半年系统集成项目管理工程师《综合知识》真题及答案解析汇总】
71、The ETL technology is mainly used in (  ) stage.
A、 data collection
B、 data storage
C、 data management
D、 data analysis
信管网参考答案：A
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72、(  ) is not used on perception layer of Internet of Things.
A、 WLAN
E、RFID
C、 Bluetooth
D、 SOA
信管网参考答案：D
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73、The (  ) is a hierarchical decomposition of the total scope of work to be carried out by the project team to accomplish the project objectives and create the required deliverable.
A、 OBS
B、 WBS
C、 RBS
D、 RAM
信管网参考答案：B
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74、(  ) is a measure of schedule performance expressed as the difference between the earned value and the planned value.
A、 Schedule variance (SV)
B、 Cost variance (CV)
C、 Actual cost (AC)
D、 Earned value (EV)
信管网参考答案：A
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75、(  ) information is not disclosed to unauthorized individuals.
A、 Authenticity
B、 Integrity
C、 Availability
D、 Confidentiality
信管网参考答案：D
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