过电流方向保护是在过流保护的基础上，加装一个（）而组成的。 ["负序电压元件","复合电流继电器","方向元件"]
Which two statements are true about the Automatic Diagnostic Repository (ADR)?（） (Choose two.) [" The ADR base keeps all diagnostic information in binary format"," SQL*Plus provides the ADRI script, which can be used to work with ADR"," The ADR can be used for problem diagnosis only when the database is open"," The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null"," The ADR can be used for problem diagnosis even when the database instance is down"," The ADR base is shared across multiple instance"]
In your database instance， the user sessions are connected to the database server from the remotemachines. You want to achieve the following for these users： 1：The user account must be locked after four unsuccessful login attempts.PASSWORD_LOCK_TIME 2：The user must be prompted to change the password at regular intervals.PASSWORD_LIFE_TIME 3：The user may not have more than three simultaneous sessions.SESSIONS_PER_USER 4：The user session must automatically be logged off if more than 10 minutes elapsed time used.CONNECT_TIME 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"]
西方国家经历的税收发展的阶段包括（）。 ["自由贡纳时期","税收承诺时期","专制课税时期","立宪课税时期"]
The user SCOTT executes the following command successfully to increase the salary values in one of his sessions： SQL> UPDATE emp SET sal=sal*1.15 WHERE deptno=20； Before SCOTT ends the transaction， user HR who has the privileges on EMP table executes a query to fetch the salary details but finds the old salary values instead of the increased values. Why does HR still see the old data？（） ["because of redo data from redo log file","because of data from database buffer cache","because of data from a temporary tablespace","because of undo data from the undo tablespace"]
请详述氯丙嗪的药理作用。
