单项选择题
A.query B.test C.check D.recovery
（）statementcanperformacalculationandstoretheresultinava...
单项选择题（）statementcanperformacalculationandstoretheresultinavariablesothatitcanbeusedlater.
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
