Dataitemsareaddedordeletedfromthelistonlyatthetopofthe（）.

单项选择题（）meansthataprogramwrittenforonecomputersystemcanbecompiledandrunonanothersystemwithlittleornomodification.

A.Portability
B.Reliability
C.Availability
D.Reusability

单项选择题（）hasbecomeafactofmodemlife，withmillionsofpeoplenowshoppingon-line.

A.E-mail
B.E-commerce
C.E-Iearning
D.E-communication

单项选择题Thedata（）includesthefunctionofupdatingdataonadatabase，andretrievingdatafromadatabase.

A.management
B.storage
C.analysis
D.communication

单项选择题TCP IP（）arethestandardsaroundwhichtheInternetwasdeveloped.

A.protocols
B.agreements
C.conventions
D.coordination

单项选择题C++fullysupports（）programming，includingthefourproperties：encapsulation，datahiding，inheritance，andpolymorphism.

A.computer-oriented
B.procedure-oriented
C.object-oriented
D.aspect-oriented