题目内容

You database is running an ARCHIVELOG mode. The following parameter are set in your database instance: LOG_ARCHIVE_FORMAT = arch+%t_%r.arc LOG_ARCHIVE_DEST_1 = ‘LOCATION = /disk1/archive’ DB_RECOVERY_FILE_DEST_SIZE = 50G DB_RECOVERY_FILE = ‘/u01/oradata’ Which statement is true about the archived redo log files?（）

A. They are created only in the location specified by the LOG_ARCHIVE_DEST_1 parameter.
B. They are created only in the Fast Recovery Area.
C. They are created in the location specified by the LOG_ARCHIVE_DEST_1 parameter and in the default location $ORACLE_HOME/dbs/arch.
D. They are created in the location specified by the LOG_ARCHIVE_DEST_1 parameter and the location specified by the DB_RECOVERY_FILE_DEST parameter.

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按照计税依据数额大小设置的逐级递增的系列税率称为（）

A. 比例税率
B. 累进税率
C. 单一定额税率
D. 差别定额税率

630A以上的断路器与其上方刀开关间的垂直距离不小于（）。

A. 200mm
B. 250mm
C. 300mm
D. 350mm

当采用直流保护跳闸回路时，应采用双极控制，即正、负端同时跳变。

A. 正确
B. 错误

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