配送实质是送货。配送是一种送货,但和一般送货有区别:一般送货可以是一种偶然的行为,而配送却是一种有确定组织、确定渠道,有一套装备和管理力量、技术力量,有一套制度的体制形式。所以,配送是高水平送货形
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太极拳的呼吸方法应()以为主。
A. 胸式呼吸
B. 口鼻呼吸
C. 自然呼吸
Your database is open and running in ARCHIVELOG mode. You take RMAN full backups every Sunday night. On Monday morning, while querying the user1.employees table, you receive the following error message: 01578: ORACLE data block corrupted (file # 5, block # 51) ORA01110: data file 5: ’/u01/app/oracle/oradata/orcl/example01.dbf’ You need to rectify the corruption while ensuring the following: The data file should remain online. The mean time to recover (MTTR) should be minimal. You are not using a backup control file, and all the archived logs are accessible. Which option would you choose?()
A. flash back the corrupted blocks
B. use the DBMS_REPAIR package
C. use the RMAN TSPITR command
D. use the RMAN BLOCKRECOVER command
E. use the RESTORE DATABASE and RECOVER DATABASE commands
F. investigate the time at which the corruption occurred and perform a pointintime recovery
排序过程中,每一趟从无序子表中将一个待排序的记录按其关键字的大小放置到已经排好序的子序列的适当位置,直到全部排好序为止,该排序算法是()。
A. 直接插入排序
B. 快速排序
C. 冒泡排序
D. 选择排序