题目内容

仪表稳压器不能使输出电压保持稳定。

A. 正确
B. 错误

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其高者,因而越之

IP报文的第三个字段是()

A. 版本号
B. 长度
C. 服务类型
D. 协议

You lost the PRODSTD tablespace, which was read/write. The tablespace was read­only when the last backup was performed. How would you recover the tablespace?()

A. restore the tablespace from the backup; there is no need to apply the redo information
B. restore the full database to recover the data up to the point when you performed the backup
C. restore the tablespace from the backup, and then perform a recovery using the backup control file
D. restore the tablespace from the backup, and then recover the tablespace; all the redo information from the point when the tablespace was made read/write is applied

一般保证的保证人与债权人未约定保证期间的,保证期间为之日起()。

A. 半年
B. 一年
C. 二年
D. 三年

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