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什么是游艺民俗的特色？

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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?（）

A. Only one channel is allocated and the backup is created in the flash recovery area
B. Only one channel is allocated and the backup is created in the destination specified for channel 1
C. Two channels are allocated and backup sets are created in the destinations specified for channels 1 and 2
D. Three channels are allocated and backup sets are created in the destinations specified for channels 1, 2, and FRA

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为什么在社会主义建设中要坚持物质文明和精神文明建设两手抓，两手都要硬的方针？

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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？（）

A. Set the BACKUP_TAPE_IO_SLAVES parameter to FALSE
B. Set the BACKUP_TAPE_IO_SLAVES parameter to TRUE
C. Use compression when performing tape backups
D. Configure multiple SBT channel

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基坑支护中采用钢筋混凝土支撑时，其强度达（）要求后，方可开挖支撑面以下土方。

A. 国标
B. 强条
C. 设计
D. 标准工艺

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