直流电机铭牌上标注的额定功率（）。 电机的输入功率。 输出功率。 电机消耗功率。
A database is running in ARCHIVELOG mode and regular backups are performed. A user receives the following error message . Which is the recommended sequence of operations you need to perform for the query successfully?（） Drop the affected tablespace, re-create the tablespace, restore the datafiles, and the tablespace. 。 Take the affected datafile offline (if not already offline), restore the damaged image of the datafile, and then bring it online. 。 Restart the database in MOUNT mode, restore the damaged datafile, recover the datafile and then open the database with resetlogs.。 Put the database in RESTRICTED mode, restore all the datafiles in the affected datafile and recover the tablespace, and then put the database in normal operational mode.&e。
关于石膏技术性能的说法，正确的是（）。 防火性能差。 耐水性差。 凝结硬化慢。 硬化易收缩。
往复式压缩机排气压力范围广，从低压到（）都适用。
A class games.cards.Poker is correctly defined in the jar file Poker.jar. A user wants to execute the main method of Poker on a UNIX system using the command：java games.cards. Poker What allows the user to do this？（） put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/java。 put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/java/*.jar。 put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/java/Poker.jar。 put Poker.jar in directory /stuff/java/games/cards， and set the CLASSPATH to include /stuff/java。
下列哪项工作不属于业务关系管理的范围（）
