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外科手消毒的目的是()

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A 1米以内
B 1.2米以内
C 1.5米以内
D 2米以内

A 资产负债率
B 现金比率
C 资本化比率
D 固定资产比率
E 股东权益比率

YouworkasadatabaseadministratoratCertkiller.com.YourdatabaseisopenandrunninginARCHIVELOGmode.YoutakeRMANfullbackupseverySundaynight.OnMondaymorning,whilequeryingtheuser1.employeestable,youreceivethefollowingerrormessage:
01578:ORACLEdatablockcorrupted(file#5,block#51)
ORA-01110:datafile5:’/u01/app/oracle/oradata/orcl/example01.dbf’
Youneedtorectifythecorruptionwhileensuringthefollowing:
Thedatafileshouldremainonline.
Themeantimetorecover(MTTR)shouldbeminimal.
Youarenotusingabackupcontrolfileandallthearchivedlogsareaccessible.
Whichoptionwouldyouchoose?()

简述大众传媒成为现代社会中政策主体的一个重要因素的原因

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