You have two database servers SEMP and SACCT. The database in the SEMP server maintains theemployee information and the database in the SACCT server maintains the accounts payable information.The employees submit the expense reports to the accounts payable department. A user of the accountspayable database wants to extract the employee information from the database in the SEMP server for cross-verification. Which schema object enables the user to access the information from the remote database（） ["Cluster","Database link","Mapping table","Materialized view"]
（）水行政主管部门要组织对项目法人单位的行政和技术负责人进行培训，未经培训，不得上岗。 ["省级","市级","县级","以上都不对"]
Which two are possible results？（） ["0， 2， 4， 4， 6， 8， 10， 6","0， 2， 4， 6， 8， 10， 2， 4","0， 2， 4， 6， 8， 10， 12， 14","0， 0， 2， 2， 4， 4， 6， 6， 8， 8， 10， 10， 12， 12， 14， 14","0， 2， 4， 6， 8， 10， 12， 14， 0， 2， 4， 6， 8， 10， 12， 14"]
When building the job stream MASTER#NEW_STREAM in the composer command line， which option should be used to apply the settings in the Variable Table "LIVE_VARS" to be associated to the jobs in the job stream？（） ["A","B","C","D"]
由于地层产油的综合含水上升，使用化学药品应是：（） ["按原比例加药","根据综合含水上升情况调整","增加加药浓度"]
试述关节松动术的作用。
