[单选]
Your database is in manual archive mode. Your online redo log groups are configured as follows：

You discover that DISK 3 has encountered a media failure that has resulted in a loss of all the multiplexed copies of online redo log files.
You decide to delete the REDO01C.LOG， REDO02C.LOG， and REDO3C.LOG files to prevent the LGWR background process from attempting to access these files. When you query the V$LOG dynamic view， you receive the following output：

Which sequence of statements should you use to drop the missing online redo log files from the database？（）
1. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO01C.LOG’；
2. ALTER SYSTEM SWITCH LOGFILE；
3. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO03C.LOG’；
4. ALTER SYSTEM ARCHIVE LOG GROUP 3；
5. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO02C.LOG’；
6. ALTER SYSTEM ARCHIVE LOG GROUP 1；

A . 5， 3， 2， and 1
B . 1， 5， 3， and 2
C . 4， 3， 2， 5， 1， and 6
D . 5， 4， 3， 2， 6， and 1

You executed the following commands to find the location of the alert log file： Where is the alert log file stored（） in the BACKGROUND_DUMP_DEST location； in text format。 in the BACKGROUND_DUMP_DEST location； in XML format。 in the BACKGROUND_DUMP_DEST location； in both text and XML format。 in the DIAGNOSTIC_DEST/diag/rdbms/orcl/orcl/alert directory； in text format。 in the DIAGNOSTIC_DEST/diag/rdbms/orcl/orcl/alert directory； in XML format。 in the DIAGNOSTIC_DEST/diag/rdbms/orcl/orcl/alert directory； in both text and XML format。城市快速路、主干路路床顶面以下0～300mm范围内，采用重型击实标准，土的压实度应不低于（）。 87%。 90%。 93%。 95%。绝对压力当代学生角色扮演有哪些冲突和变化？三级管基极的作用是（）载流子。发射。输送和控制。收集。

Your database is in manual archive mode. Your online redo log groups are configured as follows：

You discover that DISK 3 has encountered a media failure that has resulted in a loss of all the multiplexed copies of online redo log files.
You decide to delete the REDO01C.LOG， REDO02C.LOG， and REDO3C.LOG files to prevent the LGWR background process from attempting to access these files. When you query the V$LOG dynamic view， you receive the following output：

Which sequence of statements should you use to drop the missing online redo log files from the database？（）
1. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO01C.LOG’；
2. ALTER SYSTEM SWITCH LOGFILE；
3. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO03C.LOG’；
4. ALTER SYSTEM ARCHIVE LOG GROUP 3；
5. ALTER DATABASE DROP LOGFILE MEMBER ’E：\REDO02C.LOG’；
6. ALTER SYSTEM ARCHIVE LOG GROUP 1；

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