单项选择题
A.Very High
B.High
C.Moderate
D.Low
E.Very Low
单项选择题 RateyourlevelofproficiencywithrestoringandbackingupWindowsXPProfessional，systemstatedata，anduserdata.（）
单项选择题 RateyourlevelofproficiencywithmonitoringandoptimizingsystemperformanceandreliabilityofWindowsXPProfessionalfordesktopandmobileusers.（）
单项选择题 Rateyourlevelofproficiencywithimplementing，managing，andtroubleshootingdevicesanddrivers，includingdiskdevices，displaydevices，inputandoutput（I/O）devices，anddriversigning.（）