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尽管;任凭 prep. d_ _ _ _ _ _
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Examinethisstatement:RMANBACKUPFORMAT’/BACKUP/df_%d_%s_%p.bus1DATABASEfilesperset=2;WhatstatemustthetargetdatabasebeinforyoutousethisRMANcommand?()
A.Thetargetdatabasemustbeopen.B.Thetargetdatabasemustbeclosed.C.Thetargetdatabasemustbemounted.D.Thetargetdatabasemustbemountedoropen.
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YouareusingRMANtoperformacloseddatabasebackupofyourdatabase.YouissuetheseRMANcommands:STARTUPMOUNT;BACKUPFORMAT’/BACKUP/df_%d_%s_%p.bus’DATABASEfilesperset=2;Whichcomponentsareincludedinthebackup?()
A.Onlythedatafiles.B.Onlythedatafilesandtheonlinelogs.C.Thedatafiles,controlfiles,andtheonlinelogs.D.Thedatafilesandcontrolfiles,butnottheonlinelogs.
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设有关系R(书号,书名),如果要检索书名中至少包含4个字母,且第2个字母为D的图书,则SQL查询语句中WHERE子句的条件表达式应写成A.书名LIKE '%_ D_ %'B.书名LIKE '_ D_%'C.书名LIKE ' _ D_ _%'D.书名LIKE '_ % D _ _'
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2、沟通的方式有: a身体语言 b语言 c文字书面 d_身体语言,语言和文字书面
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