You work as a database administrator for Certkiller .com. Your database is functional. One of the disks containing a mirrored redo log member has bad sectors in it. You are unable to fix the damaged file. How does the loss of a redo log member affect the instance of the database that is currently running？（） ["The instance would normally abort.","The instance would not be affected.","The instance would be invalid， so would have to be aborted.","The instance would remain open， but the LGWR process would fail.","The instance would remain open and would automatically create the missing file"]
手动正常停车时，先将丙烷制冷压缩机负荷用“DEG”降至（） ["10%","5%","0","15%"]
论述往复式压缩机级间压力低于正常压力的原因及排除方法。
如何理解和测算机器设备的功能性贬值？
Given： Which statement is true？（） ["Compilation fails because the hashCode method is not overridden.","A HashSet could contain multiple Person objects with the same name.","All Person objects will have the same hash code because the hashCode method is not overridden.","If a HashSet contains more than one Person object with name="Fred"， then removing another Person，also with name="Fred"， will remove them all."]
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