题目内容（请给出正确答案）

[主观题]

The main reason that the young tutors make such successful teachers seems to be that _____

A．they enjoy being the centre Of attention

B．they know their pupils' problems very well

C．they are never strict with their pupils

D．their pupils enjoy playing games with them

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更多“The main reason that the young…”相关的问题

第1题

YouexecutedthefollowingcommandinRecoveryManager（RMAN）：RMAN>RESTORECONTROLFILE；Whichoperationmustyouperformbeforethiscommandisexecuted？（）

A.backupthecontrolfiletotrace

B.bringdatabasetotheMOUNTstate

C.openaconnectiontotheRMANrecoverycatalog，whichcontainstheRMANmetadataforthetargetdatabase

D.setthedatabaseID（DBID），butonlyiftheDB_NAMEparameterassociatedwiththetargetdatabaseisuniqueintherecoverycatalog

点击查看答案

第2题

YouexecutedthefollowingcommandinRecoveryManager（RMAN）：RMAN>RESTORECONTROLFILE；Whichoperationmustyouperformbeforethiscommandisexecuted？（）

A.backupthecontrolfiletotrace

B.bringdatabasetotheMOUNTstate

C.openaconnectiontotheRMANrecoverycatalog，whichcontainstheRMANmetadataforthetargetdatabase

D.setthedatabaseID（DBID），butonlyiftheDB_NAMEparameterassociatedwiththetargetdatabaseisuniqueintherecoverycatalog

点击查看答案

第3题

YouexecutedthefollowingcommandinRecoveryManager（RMAN）againstyourOracle10gdatabase：RMAN>REPORTNEEDBACKUPdays3Whatwouldbetheoutputofthiscommand？（）

A．alistoffilesthatrequireabackupwithinthreedays

B．alistoffilesthathavenotbeenbackedupforthreedays

C．alistoffilesthatRMANrecommendsbebackeduponlyonceineverythreedays，basedonlowvolatility

D．alistoffilesforwhichabackuphasalreadybeenperformedandmayneedabackupafterthreedays

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第4题

YouexecutedthefollowingcommandinRecoveryManager（RMAN）：RMAN>REPORTNEEDBACKUPdays3；Whatistheoutputofthiscommand？（）

A.alistoffilesthatrequireabackupwithinthreedays

B.alistoffilesrequiringmorethan3daysofarchivelogstoapply

C.alistoffilesthatRMANrecommendsbebackeduponlyonceineverythreedays，basedonlowvolatility

D.alistoffilesforwhichabackuphasalreadybeenperformedinthelastthreedaysandwhichisrequiredtobebackedupagainbasedonthehighnumberoftransactionsperformedonthem

点击查看答案

第5题

YouexecutedthefollowingcommandinRecoveryManager（RMAN）：RMAN>RESTORECONTROLFILEWhichoperationmustyouperformbeforethiscommandisexecuted？（）

A.backupthecontrolfiletotrace

B.bringdatabasetotheMOUNTstate

C.openaconnectiontotheRMANrecoverycatalog，whichcontainstheRMANmetadataforthetargetdatabase

D.setthedatabaseID（DBID），butonlyiftheDB_NAMEparameterassociatedwiththetargetdatabaseisuniqueintherecoverycatalog

点击查看答案

第6题

YouexecutedthefollowingcommandinRecoveryManager（RMAN）toperformabackupoftheDETTBStablespace：RMAN>BACKUPTABLESPACEDETTBS；Underwhichconditionswouldthiscommandexecutesuccessfully？（）

A．ThedatabaseisinNOMOUNTstate.

B．ThedatabaseisinARCHIVELOGmodeandthetablespaceisonline.

C．ThedatabaseisinARCHIVELOGmodeandthetablespaceisoffline.

D．ThedatabaseisinNOARCHIVELOGmodeandthetablespaceisonline.

E．ThedatabaseisinNOARCHIVELOGmodeandthetablespaceisoffline.

点击查看答案

第7题

YouexecutedthefollowingcommandinRecoveryManager（RMAN）againstyourOracle10gdatabase：RMAN>REPORTNEEDBACKUPdays3；Whatwouldbetheoutputofthiscommand？（）

A．alistoffilesthatrequireabackupwithinthreedays

B．alistoffilesthathavenotbeenbackedupforthreedays

C．alistoffilesthatRMANrecommendsbebackeduponlyonceineverythreedays，basedonlowvolatility

D．alistoffilesforwhichabackuphasalreadybeenperformedandmayneedabackupafterthreedays

点击查看答案

第8题

YouexecutedthefollowingcommandinRecoveryManager（RMAN）toperformabackupoftheDETTBStablespace：RMAN>BACKUPTABLESPACEDETTBS；Underwhichconditionswouldthiscommandexecutesuccessfully？（）

A．ThedatabaseisinNOMOUNTstate.

B．ThedatabaseisinNOARCHIVELOGmodeandthetablespaceisonline.

C．ThedatabaseisinNOARCHIVELOGmodeandthetablespaceisoffline.

D．ThedatabaseisinARCHIVELOGmodeandthetablespaceisoffline.

E．ThedatabaseisinARCHIVELOGmodeandthetablespaceisonline.

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第9题

晶格中的缺陷存在，使钢材受力时的（）

A．R_{m实=R_m理}

B．R_{m实>R_m理}

C．R_{m实稍小于R_m理}

D．R_{m实<R_m理}