On Monday， you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday， you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct？（） You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.。 You can restore the DEPT table by using the Oracle Flashback Drop feature， provided you use the RENAME TO clause.。 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.。 You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.。
防污染类
Click the Exhibit button. What is the result？（） The code will deadlock.。 The code may run with output "2 0 6 4".。 The code may run with no output.。 The code may run with output "0 6".。 An exception is thrown at runtime.。 The code may run with output "0 2 4 6".。
Which two are the prerequisites to enable Flashback Data Archive？（） Database must be running in archivelog mode.。 Automatic undo management must be enabled.。 Undo retention guarantee must be enabled.。 The tablespace on which the Flashback Data Archive is created must be managed with Automatic Segment Space Management （ASSM）.。
OECD在防止国际税收恶性竞争的报告中提出的有关税收恶性竞争的具体的实务性标准有（）。 对所得实行低有效税或零税率。 税收制度显得封闭保守，存在环形篱笆。 税收运作缺乏透明度。 不能有效与其他国家进行信息交流。。
根据参评企业的特征，评价标准设置火电、送变电、水电、（）等五个专业类别。
