Examine the following command:ALTER SYSTEM SET enable_ddl_logging=FALSE;Which statement is true?()
A. None of the data definition language (DDL) statements are logged in the trace file.
B. Only DDL commands that resulted in errors are logged in the alert log file.
C. A new log.xml file that contains the DDL statements is created, and the DDL command details are removed from the alert log file.
D. Only DDL commands that resulted in the creation of new database files are logged.
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列车上发生旅客携带危险品应就地销毁,使之不能危害并不承当任何赔偿责任。
A. 正确
B. 错误
将钢件加热到临界温度以上,经适当保温,然后随炉缓慢冷却的一种工艺称为()。
A. 退火
B. 正火
C. 淬火
D. 调质
“文章合为时而著,歌诗合为事而作”,是()在《与元九书》中提出的著名观点。
各科室借阅文件,均需办理借阅手续,填写(),用完后及时归还,不得长期留用。