单项选择题
A. One， two， three or four processors
B. One， two， or three processors
C. One， three， or four processors
D. One， two or four processors
多项选择题 Which of the following assists with airflow in a server?（）
单项选择题 Aserverwasrecentlyupdatedwiththelatestantivirusdefinitions.Immediatelyaftertheupdate，theserverbeginstoreport‘filenotfound’errorsforamissioncriticalapplication.Whichofthe followingistheMOSTlikelyreasonforthis？（）
单项选择题 WhichofthefollowingisanadvantageofattachingaNASdevicetothenetwork？（）