应急通信系统的维护管理原则是集中统一领导和分级管理.
A、对
B、错
You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback?()
AOracle Flashback uses undo information to construct consistent data.
BYou can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session.
CYou can only use Oracle Flashback view of the data if the required records are still in the online redo log files.
DOracle Flashback lists the DML that was executed during the period you identify when initiating your session.
Click the Exhibit button and examine the diagram, which illustrates the components performing tasks within an Oracle Shared Sever environment. Which task is being performed by component 4?()
A、The PMON process registers the request in the response queue.
B、A shared sever places the process request in the response queue.
C、A request within the request queue is processed by an idle shared server process.
D、A dispatcher assigns a request from the request queue to and idle shared server process.
Fibonacci数列的规律是:前两个数为1,从第三个数开始,每个数是它前两个数之和,即:1,1,2,3,5,8,13,21,34,55,89,…。某人编写了下面的函数,判断大于1的整数x是否为Fibonacci数列中的某个数,若是,则返回True:否则返回False。测试时发现,对于所有正整数x,函数都返回False,程序需要修改。下面的修改方案中正确的是( )。
A、把a=b与b=c的位置互换
B、把c=a+b移到b=c之后
C、把Do While xb
D、把If x=b Then flag=True改为If x=a Then flag=True
将第一张幻灯片副标题的动画效果设置为:“切入”、“自左侧”;将第二张幻灯片版式改变为“垂直排列标题与文本”;在演示文稿的最后插入一张版式设置为“仅标题”幻灯片,键入“细说生活得失”。
创建索引文件的命令是( )。
A、ORDER
B、INEDX
C、SET INDEX TO
D、SET ORDER TO