【判断题】直接耦合放大电路前后级放大电路的静态工作点相互独立,互不影响。
【单选题】You perform a backup using the following BACKUP command: RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE,Which statement is true of this command?()
A.
A different procedure is required to restore a database from compressed backups
B.
The AS COMPRESSED clause of the BACKUP command provided by RMAN is used to create compressed backup sets and image copies.
C.
Using this command to create backups minimizes the bandwidth consumed.
D.
Using this command to create backups improves the performance of the backup process
【单选题】在两级共射直接耦合放大电路中前后两极的静态工作点 () 。 A 、 彼此独立,互不影响 B 、 互相影响,互相牵制 C 、 后级对前级有影响,前级对后级无影响
【单选题】According to your backup strategy, you performed an incremental level 0 backup of yourdatabase. Which statement regarding this backup is true?()
A.
The backup is similar to image copy.
B.
The backup contains all used data blocks.
C.
The backup contains only unused data blocks.
D.
The backup contains all data blocks changed since the last incremental level 1 backup.
【单选题】哮喘持续状态,失水、痰黏稠难以咳出,最有效的祛痰治疗是
【单选题】Which command is used to configure RMAN to perform a compressed backup for every backup executed?()
A.
BACKUP AS COMPRESSED BACKUPSET DATABASE
B.
BACKUP AS COMPRESSED COPY OF DATABASE
C.
CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET
D.
CONFIGURE DEVICE TYPE DISK BACKUP TYPE COMPRESS
E.
BACKUP DATABASE COMPRESS
【判断题】直接耦合前后级的静态工作点互相独立,相不影响。
【多选题】一些技术人员正在使用笔记本电脑进行无线现场勘测,笔记本电脑的无线接口卡上装有现场勘测实用程序,他们从AP往外走,一边移动一边测量信号强度和链路速度。他们会利用此信息进行哪两项操作
C.
在信号质量或链路速度变化时记录读数并测量与AP之间的距离
D.
确保符合所有当地、州(省)和国家的防火和电气法规
E.
使用该结果来估计潜在用户的数量并确定预期的使用高峰