单选题You can take anything from the shelf and read, but please______the books when you've finished with them.Aput onBput downCput backDput off
单选题
You can take anything from the shelf and read, but please______the books when you've finished with them.
A
put on
B
put down
C
put back
D
put off
参考解析
解析：
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单选题You can take anything from the shelf and read, but please______the books when you've finished with them.Aput onBput downCput backDput off
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单选题A：Can I do anything for you？ B：（）ANo. You can't do anything for me.BNo，it's alright. I can manage myself.CNever mindDIt's my pleasure
单选题A:Can I do anything for you？ B:（）ANo. You can't do anything for me.BNo,it's alright. I can manage myself.CNever mindDIt's my pleasure.
单选题From this passage, we can learn that _____.Ayou can read an ebook on a laptop when you travelByou can order an ebook using the Ebook ReaderCthe ebooks ordered have to be shipped to youDit takes a lot of trouble reading an ebook
单选题Your database is running in NOARCHIVELOG mode with two online redo log files. The SALES table contains sales information for the organization. The SALES table belongs to the SALESTB tablespace. On Monday， you insert 10 rows into the SALES table. The current log sequence number is 14. You change the tablespace status from READ WRITE to READ ONLY for the SALESTB tablespace. You shut down the database and take a backup of the SALESTB tablespace. On Tuesday， you start the database. You change the status for the SALESTB tablespace from READ ONLY to READ WRITE. You insert 10 more rows into the SALES table and shut down the database. The current log sequence number is 15. When you try to open the database on Wednesday morning， you discover that the SALESTB tablespace was lost because of a media failure. Which of the following options is true about recovering the SALES table？（）A The SALES table cannot be recovered because the database is running in NOARCHIVELOG mode.B The SALES table can be recovered by restoring the SALESTB tablespace from the backup and performing a media recovery.C The SALES table can be recovered by restoring the SALESTB tablespace from the backup without performing any media recovery.D The SALES table can be recovered by restoring the SALESTB tablespace from the backup， but the rows inserted on Tuesday need to be inserted again.
单选题Your database is configured in NOARCHIVELOG mode. Due to a media failure， you have lost one of the datafiles belonging to a read-only tablespace. You know that the last backup was performed after the tablespace was made read-only. Which action should you take to restore the missing datafile in the minimum amount of time？（）A Restore all the datafiles from the backup.B Restore only the lost datafile from the backup.C Restore all the datafiles for the lost tablespace from the backup.D Restore all the datafiles for the lost tablespace and all the SYSTEM and SYSAUX datafiles from the backup.