71、WLAN is increasingly popular because it enables cost-effective （） among people and applications that were not possible in the past.
A、line B、circuit C、connection D、Interface

72、（）is not included in the main

71、WLAN is increasingly popular because it enables cost-effective （） among people and applications that were not possible in the past.
A、line               B、circuit              C、connection               D、Interface
 
72、（）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、Securitymanagement                                         D、Business change
 
73、In project time management, activity definition is the process of identifying and documenting the specific action to be performed to produce the project deliverables. （）are not output of activity definition.
A、Activity list                              B、Work Breakdown Structures
C、Activity Attributes                            D、Milestone Lists
 
74、The customer asks your project to be completed 6 months earlier than planned、You think this target can be reached by-overlapping project activities. This approach is known as （）.
A、balance engjneering       B、fast-tracking        C、leveling                  D、Crashing
 
75、The auditing function that provides feedback about the quality of output is referred to as （）.
A、quality control                                B、quality planning
C、quality assurance                           D、quality improvement