The EMP table contains these columns: You need to display the employees who have not been assigned to any department. You write the SELECT statement: What is true about this SQL statement?（） [" The SQL statement displays the desired results."," The column in the WHERE clause should be changed to display the desired results."," The operator in the WHERE clause should be changed to display the desired results."," The WHERE clause should be changed to use an outer join to display the desired results."]
依据加涅的学习分类，学习主要是为了获得（） ["言语信息","心智技能","认知策略","态度"]
简述我国对学前儿童游戏基本特征的认识。
You executed the following command： RMAN> RECOVER COPY OF DATAFILE ’/u01/app/oracle/oradata/orcl/users01.dbf’； Which statement regarding the above command is correct？（） [" The ’\/u01\/app\/oracle\/oradata\/orcl\/users01.dbf’ data file is recovered from the image copy."," The ’\/u01\/app\/oracle\/oradata\/orcl\/users01.dbf’ data file is recovered from the last incremental backup."," Image copies of the ’\/u01\/app\/oracle\/oradata\/orcl\/users01.dbf’ data file are updated with all changes up to incremental backup SCN."," Image copies of the ’\/u01\/app\/oracle\/oradata\/orcl\/users01.dbf’ data file are recovered using the above command if data file recovery fails."]
对于立式往复式压缩机，滑道在检修时发现“拉毛”现象，只将有“拉毛”侧的滑道进行修 复，另一侧不必修复。
微生物污染食品的途径及其控制措施。
