当自变量X与因变量Y之间的相关程度r为正时,说明()
A. X与Y正相关
B. X与Y负相关
C. X与Y不相关
D. X与Y完全相关
Note the following points describing various utilities in Oracle Database 11g: 1. It enables the transfer of data from one database to another. 2. It provides a complete solution for the backup, restoration, and recovery needs of the entire database. 3. It enables the loading of data from an external file into tables of an Oracle database. 4. It provides a tape backup management for the Oracle ecosystem. Which point describes the Oracle Data Pump utility()
A. 1
B. 2
C. 3
D. 4
E. 1 and 3
F. 1, 2, 3, and 4
Diameter协议中,消息命令字是在哪个消息头字段体现的()
AVP Code
B. AVP Data
Command-Code
D. Application id
一个4体低位交叉的存储器,假设存储周期为T,CPU每隔1/4存取周期启动一个存储体,试问依次访问64个字需多少个存取周期?