（）is not included in the main contents of the operation and maintenance of the  information system.

（）is not included in the main contents of the operation and maintenance of the  information system.

A．Daily operation and maintenance  

B．System change

C．Security management                                  

D．Business change

参考答案：D

参考解析：下列（）不是信息系统运维工作的内容。

A、日常运维

B、系统更新 

C、安全管理 

D、业务更新