说明WindowsNT中异步I/O操作的特点.

根据《中国电信ChinaNet组网与策略规范（2010版）》，NAP设备简称（）。

A、C设备

B、D设备

C、E设备

D、I设备

E、N设备

F、S设备

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

患者，男性，63岁，行纤维支气管镜检，3日后咳黄色黏痰，体温38.5～39℃。血常规：白细胞增高，应首先考虑（）

A、上呼吸道感染

B、咽炎

C、肺部感染

D、化脓性扁桃体炎

E、肺结核

Two data files have been deleted at the operating system level by accident. Your database is running in ARCHIVELOG mode and online backups are taken nightly. One of the data files that has been deleted belongs to the USERS tablespace on the other belongs to the SYSTEM tablespace. How can you recover from this situation？（）

A、Shut down the database, restore the two data files and then start up the database. 

B、Take the system and users tablespace offline, restore the two data files, recover the two datafiles, and then bring the SYSTEM and USERS tablespaces online. 

C、Shut down the database, restore the two data files, start up the database in MOUNT mode, recover the two data files, and then alter the database open. 

D、Take the SYSTEM and USERS tablespaces offline, recover the two datafiles and then bring the SYSTEM and USERS tablespaces online.

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.