“了解中学生世界观、人生观、价值观形成的过程及其教育方法”是教师应具备的通识性知识。
In your database instance， the user sessions are connected to the database server from the remote machines.You want to achieve the following for these users： 1. The user account must be locked after four unsuccessful login attempts. 2. The user must be prompted to change the password at regular intervals. 3. The user may not have more than three simultaneous sessions. 4. The user session must automatically be logged off if more than 10 minutes elapsed time used. How would you accomplish the above（） By assigning profiles for the users。 By implementing Fine-Grained Auditing （FGA）。 By granting a secure application role to the users。 By implementing the Database Resource Manager pla。
对10kV二级负荷供电，各电气指标实测值偏离额定值的大小，允许为：电压（），频率±0.5Hz，三相电压对称性±5%。
简述对语言“约定俗成”性的理解。
You are performing a block media recovery on the tools01.dbf data file in the SALES database by using RMAN. Which two statements are correct in this scenario？（） You must ensure that the SALES database is mounted or open.。 You must restore a backup control file to perform a block media recovery.。 You must take the tools01.dbf data file offline before you start a block media recovery.。 You must put the database in NOARCHIVELOG mode to perform a block media recovery.。 You can perform only a complete media recovery of individual blocks； point-in-time recovery of individual data blocks is not supported.。
某现浇钢筋混凝土梁的跨度为8m，针对其跨中起拱高度，下列各项中满足相关劫范的有（）。
