题目内容

邓小平理论走向成熟,形成科学体系的标志是()。

A. 党的十一届三中全会和党的十二大
B. 党的十三大
C. 邓小平“南方谈话”和党的十四大
D. 党的十五大

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You want to configure the Flashback Database feature and retain flashback logs for three days. Presently the database is open and configured in ARCHIVELOG mode. The following steps must be performed in the correct sequence to do this: 1. Set the retention target: SQL> ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET=4320; 2. Enable Flashback Database: SQL> ALTER DATABASE FLASHBACK ON; 3. Mount the database: SQL> STARTUP MOUNT EXCLUSIVE 4. Shutdown the instance: SQL> SHUTDOWN IMMEDIATE 5. Open the database: SQL> ALTER DATABASE OPEN; Choose the correct sequence.()

A. 4, 1, 3, 2, 5
B. 4, 3, 1, 2, 5
C. 2, 4, 3, 5, 1
D. 4, 2, 5, 3, 1

PON技术上行采用()方式

A. 拓传方式
B. 广播方式
C. 直连方式
D. TDMA方式

夫山居而谷涉者,膢腊相遣以水

请简述变桨系统的功能.

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