You are in the middle of a transaction and very crucial data has been modified. Because of a hardware failure， the instance has shut down before synchronizing all the database files. Which two statements are true？（）
AOn startup， SMON coordinates instance recovery.
BOn startup， CKPT coordinates instance recovery.
COn startup， use RMAN to perform instance recovery.
DUncommitted changes will be rolled back after the database is opened.
EOn startup， perform media recovery and then instance recovery.
FOn startup， all the files will be synchronized and you get both committed and uncommitted data.
使用匿名FTP首先遇到的最大的问题是（）
A、必须向FTP服务器付费
B、必须预先知道所要的文件存放在哪个服务器中
C、必须在自己的微机中装入图形界面软件，如Windows等
D、必须以PPP方式入网
Which of the following is STP BEST identified by under the cable sheath？（）
A、Number of twists in wires
B、Number of wires
C、Lubricant
D、Foil
Which of the following is the MOST common pin-out configuration used when crimping RJ-45 connectors？（）
A、UTP
B、T568A/B
C、STP
D、IEEE 802.5
第3号邮局协议的英文所写为（）
A、SNMPV3
B、POP
C、SMTP
D、POP3
Which three statements are true regarding the logical structure of the Oracle database？（）
AEach segment contains one or more extents.
BMultiple tablespaces can share single data file.
CA data block is the smallest unit of I/O for data files.
DIt is possible to have tablespaces of different block sizes in a database.
EEach data block in the database always corresponds to one OS block.