单项选择题

For any information sysyem to sever its purpose, the information must be（）when it is needed.
 

A.integral
B.available
C.irreplaceable
D.confidential

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单项选择题
（）:refers to the application of the internet and other information technology in conventional industries .It is an incomplete equation where various internet(mobile internet,cloud computing,big data or internet of things) can be added to other fileds, fostering new industries and business development.

A.internet plus
B.industry 4.0
C.big data
D.cloud computing
单项选择题
（）:The capabability provided to the consumer is to use provider’s applications running on a cloud infrasture. The applications are accessible from vauious client devices through either a thin client inface, such as a web browser(e.g.,erb-based E- mail),or aprogram interface.

A.laas
B.Paas
C.saas
D.Daas
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