You are developing a tax report for the payroll application. You created a before parameter form report trigger to create three temporary tables to store text that are need while the report is executed. Which report trigger would you use to delete these temporary tables?（） ["Before parameter form. ","After parameter form. ","Before report. ","After report."]
园林树木
You have created a database link， devdb.us.oracle.com， between the databases PRODDB and DEVDB. You want to import schema objects of the HR user using Oracle Data Pump from thedevelopment database， DEVDB， to the production database， PRODDB. You execute the following command on the target database server： $impdp system/manager directory = DB_DATA dumpfile = schemas.dat schemas = hr flashback_time = 2004-02-03 09：00 The command fails， displaying the following error： ORA-39001： invalid argument value ORA-39000： bad dump file specification ORA-31640： unable to open dump file “/home/oracle/schema/schemas.dat” for read ORA-27037： unable to obtain file status What would you do to overcome the error（） ["remove the dumpfile option in the command","remove the flashback_time option in the command","remove the dumpfile option and add the network_link = devdb.us.oracle.com option in the command（Replace thedumpfile option with the network_link = devdb.us.oracle.com）","add the user， SYSTEM， to the schemas option in the command","remove the schemas option and add the network_link = devdb.us.oracle.com option in the command ","add network_link = devdb.us.oracle.com option in the command"]
开关电源系统的电池充电限流值设置为（）C10。 ["0.1C10至0.12","0.12C10至0.15","0.1C10至0.15","0.2C10至0.25"]
到19世纪中期，英国在亚洲地区完全占领了（）。（1）中国（2）印度（3）新加坡（4）奥斯曼帝国 ["（1）（2）（4）","（2）（3）（4）","（1）（4）","（2）（3）"]
对学校来说，做好教师队伍建设重点做好两件事。
