双作用叶片泵的叶片倾角常取( )度。 A.
10 B.
11 C.
12 D.
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A.YouaretheadministratorofthecompanydatabasE.NowyouareinchargeofaSQLServer2008EnterpriseEditioninstancE.ThereisadatabasenamedDB1intheinstancE.AbackupofDB1isperformedeveryday.YouhavetominimizethesizeofthefulldatabasebackupfilesofDB1.Intheoptionsbelow,whichTransact-SQLstatementshouldyouuse?（）
A.BACKUPDATABASEDB1TODISK='t:/backups/db1.bak';
B.BACKUPDATABASEDB1TODISK='t:/backups/db1.bak'WITHCOMPRESSION;
C.BACKUPDATABASEDB1TODISK='t:/backups/db1.bak'WITHDIFFERENTIAL;
D.BACKUPDATABASEDB1TODISK='t:/backups/db1.bak'WITHCOMPRESSION,DIFFERENTIAL;