甲在某商店购物时,售货员因失误多找给甲50元,甲回家途中丢失了其中的20元。回家后甲清理现金时发现多出30元,马上到商店退款,售货员清点时发现多找了50元,要求甲返还50元。甲应该()。
A. 返还50元
B. 返还30元
C. 丢失的20元甲和商店各负担10元
D. 以上说法都不正确
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成熟阶段的中气旋低层速度特征表现为()。
A. 纯粹的旋转
B. 纯粹的辐散
C. 辐合旋转
D. 辐散旋转
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.