单项选择题
A.Assignment B.Control C.I/O D.Declaration
Dataitemsareaddedordeletedfromthelistonlyatthetopofthe（...
单项选择题Dataitemsareaddedordeletedfromthelistonlyatthetopofthe（）.
A.queue B.stack C.tree D.linearlist
（）meansthataprogramwrittenforonecomputersystemcanbecomp...
（）meansthataprogramwrittenforonecomputersystemcanbecompiledandrunonanothersystemwithlittleornomodification.
A.Portability B.Reliability C.Availability D.Reusability
（）hasbecomeafactofmodemlife，withmillionsofpeoplenowshop...
单项选择题（）hasbecomeafactofmodemlife，withmillionsofpeoplenowshoppingon-line.
A.E-mail B.E-commerce C.E-Iearning D.E-communication
