单项选择题
A.CONN B.DISC C.GOTO D.LOGON
A.show account B.show accountname C.show user D.show username
A.正斜杠(/) B.反斜杠(\) C.感叹号(!) D.句号(.)
A.set server on B.set serverecho on C.set servershow on D.set serveroutput on
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