单项选择题
（）meansthataprogramwrittenforonecomputersystemcanbecompiledandrunonanothersystemwithlittleornomodification.
A.Portability B.Reliability C.Availability D.Reusability
单项选择题 （）hasbecomeafactofmodemlife，withmillionsofpeoplenowshoppingon-line.
单项选择题 Thedata（）includesthefunctionofupdatingdataonadatabase，andretrievingdatafromadatabase.
单项选择题 TCP/IP（）arethestandardsaroundwhichtheInternetwasdeveloped.
