共找到 65 与Wy 相关的结果,耗时1 ms
A.p={R1(WY),R2(XZ)}B.p={R1(WZ),R2(XY)}C.p={R1(WXY),R2(XZ)}D.p={R1(WX),R2(YZ)}
如果X→Y和WY→Z成立,那么WX→Z成立。这条规则称为______。A.增广律B.传递律C.伪传递律D.分解律
A.ρ={R1(WY),R2(XZ)}B.ρ={R1(WZ),R2(XY)}C.ρ{R1(WXY),R2(XZ))D.ρ={R1(WX),R2(YZ))
A.ρ{R1(WY),R2(XZ)}B.ρ{R1(WZ),R2(XY)}C.ρ={R1(WXY),R2(XZ)}D.ρ={R1(WX),R2(YZ)}
不符合Armstrong推理规则。A.若X→Z,X→Y,则有X→YZB.若X→Y,WY→Z,则有XW→ZC.若X→Y,Z→Y,则有X→ZD.若XZ→Y,则有X→Z
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