液化石油气钢瓶的定期检验项目包括：壁厚测定、容积测定、水压试验或残余变形率确定（）。 ["瓶阀检验","气密性试验","外观检验","残液残气处理"]
Which IBM System x server models include the eX4 Architecture？（） ["x3850 M2","x3950","x3850","x3755"]
在相同的线电压条件下，负载作为三角形连接时的有功功率是负载为星形连接时有功功率的（）倍。
You work as a database administrator for Supportcenter.cn. You started the instance using theinit.orafile. You have two control files and three redo log groups in your database. You decided to protect the database against failures by adding one more control file. Which file is the appropriate way to perform this task？（） ["Shut down the instance， copy the control file to the third location and open the database.","Abort the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.","Copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile， restart the instance and open the database.","Shut down the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.","Shut down the instance， startup in the mount state， copy the control file to the third location， modify the CONTROL_FILES parameter ininit.oraand open the database."]
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