You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（） Restore the backup control file and open the database with RESETLOGS option.。 Perform point-in-time recovery because flashback cannot be performed again on this table。 Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571。 Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571。
（）转向架最能有效控制空气弹簧高度。 SW.220K型。 CW.200K型。 AM.96型。 PW.200K型。
What is the purpose of /etc/uucp/Devices？（） Defines permissions for remote machines contacting the local machine through BNU。 Specifies dialer and modem types for uucp connections。 Defines basic communication parameters。 Assigns alternate or additional Systems， Devices and Dialers file。
国务院常务会议任命各部委领导者的副职，直属机关和办事机关的正、副职领导者的制度均属于（）。 聘任制。 选任制。 考任制。 委任制。
教师在教学中，应使学生从理论与实际的结合中来理解和掌握知识，并且引导他们运用新获得的知识去解决各种实际问题，培养他们分析问题和解决问题的能力。这一原则是（） 统一要求与因材施教相结合原则。 科学性与艺术性相结合原则。 理论联系实际原则。 科学性与教育性相结合原则。
POWER 520/550的内部硬盘SAS背板缺省可以支持几个LPAR？（）
