桥梁高程测量时，桥头两岸应设置不少于（）水准点，每岸至少设1个稳固基准点。 2个。 3个。 4个。 5个。
工业毒物侵入人体的途径常见的有三种，但不包括（）。 呼吸道；。 皮肤；。 消化道；。 血液。
You are working on the APPDB database as a DBA. The database has a default Flashback Data Archive DFLA1 created on it. You issued the following command to drop the Flashback Archive FLA1: DROP FLASHBACK ARCHIVE fla1,What is the effect of this command?（） The Flashback Archive FLA1 is dropped only if it is empty.。 The tablespace having Flashback Archive is dropped.。 The Flashback Archive FLA1 is dropped after moving the existing data in it to the default Flashback Archive.。 The Flashback Data Archive and historical data are dropped.。
In your database, the flash recovery area (FRA) is configured as the default for RMAN backups. You executed the following commands to configure the settings in RMAN: RMAN> CONFIGURE DEVICE TYPE disk PARALLELISM 2 BACKUP TYPE TO BACKUPSET; RMAN> CONFIGURE CHANNEL 1 DEVICE TYPE disk FORMAT '/home/oracle/disk1/%U'; RMAN> CONFIGURE CHANNEL 2 DEVICE TYPE disk FORMAT '/home/oracle/disk2/%U'; You issue the following RMAN command to backup the database: RMAN> RUN 2> { 3> ALLOCATE CHANNEL ch1 DEVICE TYPE disk; 4> BACKUP DATABASE; 5> } Which statement is true about the outcome?（） Only one channel is allocated and the backup is created in the flash recovery area。 Only one channel is allocated and the backup is created in the destination specified for channel 1。 Two channels are allocated and backup sets are created in the destinations specified for channels 1 and 2。 Three channels are allocated and backup sets are created in the destinations specified for channels 1, 2, and FRA。
You are tuning RMAN to optimize performance. You want tape I/O to be asynchronous when you perform tape backups. Which action should you take？（） Set the BACKUP_TAPE_IO_SLAVES parameter to FALSE。 Set the BACKUP_TAPE_IO_SLAVES parameter to TRUE。 Use compression when performing tape backups。 Configure multiple SBT channel。
Which four steps are involved to use Active Cache Dependency Injection in a WebLogic Java EE application?（）
