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问题:

[多选] You are creating a form that will access an Oracle8 database. On which three sources can you base a data block?()

A . BFILE 
B . REF column 
C . Object table 
D . Column object 
E . INSTEAD-OF trigger

下列行为中不属于正当防卫的() 假想防卫。 事前防卫。 防卫挑拨。 事后防卫。 线路保护为方向电流速断,功率方向继电器采用90°接线方式,在线路阻抗角为70°时,其灵敏角整定应为()。 30°。 -30°。 70°。 压力容器分四个压力等级,其中中压容器压力等级为() 0.1Mpa≤p≤1.6MPa。 1.6Mpa≤p≤10MPa。 10Mpa≤p≤1.6MPa。 Examine the following query output: You issue the following command to import tables into the hr schema: $ > impdp hr/hr directory = dumpdir dumpfile = hr_new.dmp schemas=hr TRANSFORM=DISABLE_ARCHIVE_LOGGING: Y Which statement is true?() All database operations performed by the impdp command are logged.。 Only CREATE INDEX and CREATE TABLE statements generated by the import are logged.。 Only CREATE TABLE and ALTER TABLE statements generated by the import are logged.。 None of the operations against the master table used by Oracle Data Pump to coordinate its activities are logged.。 简述轴与孔的冷缩配合法。 You are creating a form that will access an Oracle8 database. On which three sources can you base a data block?()
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