在分销渠道中,商品所有权()。
A. 至少要转卖一次
B. 至多转卖一次
C. 可以不发生转卖
D. 通常不发生转卖
下列选项中,属于邮储银行安全防范的重点对象是()。
A. 内部风险
B. 自然灾害
C. 外部侵害
D. 员工作案
There is a problem with one of the disks used for your database and your system administrator informs you that the disk needs to be replaced. The replacement disk will not be available until tomorrow. There was only one data file on this disk; it belongs to the USERS tablespace in your PROD database. Your PROD database runs in ARCHIVELOG mode and nightly online backups are taken. The users need to be able to access the data in the USERS tablespace before the replacement disk arrives. You have already taken the USERS tablespace offline and have restored the data file from last night’s backup to a new disk. Which additional steps are required in order to make the USERS tablespace available?()
A. Only bring the tablespace back online.
B. Only recover the tablespace and then bring the tablespace back online.
C. Shut down the database, recover the data file and then start up the database.
D. Issue the ALTER DATABASE RENAME FILE command, recover the tablespace, and then bring the tablespace online.
E. Recover the tablespace, issue the ALTER DATABASE RENAME FILE command, and then bring the tablespace online.
手工磨制试样时每换一次砂纸试样均需转换角度,与旧磨痕方向应()。
A. 平行
B. 垂直
C. 成45°
D. 随意