●Most operating systems have a standard set of（71）to handle the processing of all input and output instructions.

       A．spreadsheet

       B．control instructions

       C．I/O operation

       D．data table

       ●Cloud computing provides on-demand service to users by using distributed computing and（72）resource management.

       A．network

       B．virtual

       C．centralized

       D．Specialized

       ●The cost performance index（CPI）is the ratio of earned value to（73）and can be used to estimate the projected cost of completing the project.

       A．cost variance

       B．planned cost

       C．planned cost

       D．actual cost

       ●The document management of information system engineering supervision is an important work,among them,information the（74）is a general class file.

       A．supervision summary report

       B．weekly report

       C．meeting summary

       D．daily log

       ●When a process is in control,what do you want to do with the process?（75）.

       A．The process should not be adjusted

       B．The process may be adjusted for continuous improvement

       C．The process should be always adjusted for continuous quality

       D．The process should be regularly adjusted