如果ABàAC,则B-＞C。

下列程序输出的结果是（ ）。 #include<stdi0．h> funl(chara，charb){charC；c=a；a=b；b=C；) fun2(char*a，charb){charC；c=*a；*a=b;b=c；) fun3(char*a，char*b){charC；C=*a；*a=*b；*b=C；) voidmain（ ） { chara，b； a=A；b=B；fun1(a，b)；putchar(a)；putchar(b)； a=A；b=B；fun2(＆a，b)；putchar(a)；putchar(b)； a=A；b=B；fun3(＆a，＆b)；putchar(a)；putchar(b)； putchar(＼n)； }

A.BABBAB

B.ABBBBA

C.ABBABA

D.ABABBA

下列程序输出的结果是（ ）。 #include<stdi0．h> funl(chara，charb){charC；c=a；a=b；b=C；) fun2(char*a，charb){charC；c=*a；*a=b;b=c；) fun3(char*a，char*b){charC；C=*a；*a=*b；*b=C；) voidmain（ ） { chara，b； a='A'；b='B'；fun1(a，b)；putchar(a)；putchar(b)； a='A'；b='B'；fun2(＆a，b)；putchar(a)；putchar(b)； a='A'；b='B'；fun3(＆a，＆b)；putchar(a)；putchar(b)； putchar('＼n')； }

A.BABBAB

B.ABBBBA

C.ABBABA

D.ABABBA

You performed the RMAN database backup having a backupset key number 231 with the KEEP FOREVER option. After some days, you want to change the status of the database backup and you issued the following command:RMAN>CHANGE BACKUPSET 231 NOKEEP;What is the implication of this command?（）

A. The backup is deleted.

B. The backup is marked unavailable.

C. The backup overrides the backup retention policy.

D. the backup becomes eligible for deletion according to the existing retention policy

YouaremanaginganOracleDatabase11gdatabase.YouwanttotakeabackupontapedrivesoftheUSERStablespacethathasasingledatafileof900MB.Youhavetapedrivesof300MBeach.Toaccomplishthebackup，youissuedthefollowingRMANcommand：RMAN>BACKUPSECTIONSIZE300MTABLESPACEusers；Whatconfigurationshouldbeeffectedtoaccomplishfasterandoptimizedbackupsbyusingtheabovecommand？（）

A.TheSBTchannelmustbeconfigured，withthedefaultparallelismsettingfortheSBTdevicesetto1

B.TheCOMPATIBLEinitializationparameterforthedatabaseinstancemustbesettoatleast10.0

C.TheSBTchannelmustbeconfigured，withtheparallelismsettingfortheSBTdevicesetto3

D.TheSBTchannelmustbeconfigured，withtheMAXPIECESIZEsetto300MB

YoudefinedtheRecoveryManager（RMAN）retentionpolicytorecoverywindowof7daysbyexecutingthefollowingcommand：RMAN>CONFIGURERETENTIONPOLICYTORECOVERYWINDOWOF7DAYSWhenabackupisperformed，whatwouldbethestatusofthisbackupaftersevendays？（）

A.Thebackupwouldbemarkedasinvalid.

B.Thebackupwouldbemarkedasobsolete.

C.Thebackupwouldberemovedfromthemedia.

D.ThebackupwouldberemovedfromtheRMANrepository.

A.Thecurrentcontrolfileisnotautomaticallybackedupeverytimeyouperformabackup.

B.Thebackupssavespaceonthestoragemedia.

C.Whileperformingbackupsacrossanetwork，thenetworkbandwidthisreduced.

D.Thebackupsconsistofbackuppieces.

A、abcd

B、dcba

C、dcdc

D、abab

A.韦伯试验(Webertest，WT)主要用于比较受试者双耳骨导听力的差别B.施瓦巴赫试验(Schwabachtest，ST)主要用于比较受试者和正常人骨导听力的差别

C.盖莱试验(Gelletest，GT)主要用于比较受试耳骨导和气导听力的差别

D.音叉便于携带，试验方法简便易行;正确的音叉试验对耳聋的定性诊断准确可靠。以上是音叉检查的优点

E.韦伯试验、施瓦巴赫试验和盖莱试验三者联合分析，可用于耳聋的定性诊断