【单选题】4 5 当测验过难时,测验总分布一般呈( )
【简答题】如图,在△ABC中,∠C=90°,∠BAC=30°,AD=AB,求tanD.
【多选题】In the Cisco FabricPath domain, one switch becomes the root for the multidestination tree. Cisco FabricPath switches compare which three parameters to select the root? ()
【简答题】订货的前置时间称为订货提前期,对在制品和半成品来说,前置时间也称为()