单项选择题
A.errclear 0
B.errpt -r -j
C.errclear -j
D.errclear -k
单项选择题 Whatistheobjectiveofthesuperstrictoptionthatcanbeusedwhencreatingmirrors？（）
单项选择题 Anadministratorwantstotesttheperformanceofanapplicationatdifferentmemorysizes.Whatisthemosteffectivewaytoperformthetestandcollectstatisticalinformationforeachtest？（）
单项选择题 Auserhaswrittenascriptthatisnotrunningcorrectlyandasksanadministratorforhelp.Withoutaddinganythingtothescript，howcantheadministratordeterminethecauseoftheproblem？（）