You want to configure and schedule offline database backups to run automatically. Which tool or utilitywould you use to achieve this()
A. the XML script
B. the PL/SQL script
C. the DBMS_SCHEDULER package
D. Enterprise Manager to schedule the backu
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ADC0804是八位逐次逼近型的()
A. 数/模转换器
B. 模/数转换器
C. 调制解调器
D. 低通滤波器
跳汰频率和振幅直接决定跳汰机中水流的速度,加(),床层松散度和()。