条板隔墙上需要吊挂重物和设备时，不得单点固定，单点吊挂力应小于（）。 500N。 1000N。 1500N。 2000N。
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID NUMBER\ SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the DEPARTMENTS table You created a sequence called EMP_ID_SEQ in orderto populate sequential values for the EMPLOYEE_ID column of the EMPLOYEES table. Which two statements regarding the EMP_ID_SEQ sequence are true? （） You cannot use the EMP_ID_SEQ sequence to populate the JOB_ID column.。 The EMP_ID_SEQ sequence is invalidated when you modify the EMPLOYEE_ID column.。 The EMP_ID_SEQ sequence is not affected by modifications to the EMPLOYEES table.。 Any other column of NUMBER data type in your schema can use the EMP_ID_SEQ sequence.。 The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEES table.。 The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEE_ID column.。
在制动中立位，104型分配阀均衡活塞下方通客积室，上方通（）。 制动缸。 工作风缸。 副风缸。 滑阀室。
When running the tablespace point-in-time command recover tablespace users until time ,,10/06/2008:22:42:00 auxiliary destination ,,c:\oracle\auxiliary; you receive the following error: RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of recover command at 10/08/2008 16:00:30 RMAN-20202: Tablespace not found in the recovery catalog RMAN-06019: could not translate tablespace name "USERS" What is the likely cause of the error?（） The database is in ARCHIVELOG mode.。 There is not a current backup of the database available.。 The USERS tablespace has dependent objects in other tablespaces and can not be a part of a TSPITR alone.。 The USERS tablespace is not eligible for TSPITR because it has invalid objects.。 The recover tablespace command is incorrect and generates the error.。
国家电网公司对风电场功率预测的要求是什么？
When is it necessary for a TDA to be conducted on an installed IBM DS8800? （）
