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共找到 476316 与肺炎支原体igm阳性 相关的结果,耗时460 ms rss sitemap
下列问题基于以下的叙述:关系模式R(B,C,M,T,A,G),根据语义有如下函数依赖集:F={B→C,(M,T)→B,(M,C)→T,(M,A)→T,(A,B)→C}。关系模式R的码是A.(M,T)B. (M,C)C. (M,A)D.(A,B)
I'm tired out. I all afternoon and I don't seem to have finished anything.A. shoppedB. have shoppedC. had shoppedD. have been shopping
EFear plays no part in this latest problem.“I’m not afraid I'll lose my children.I won't lose my children. We live together, and nothing, nothing,”sh
在家庭、企业和政府的三部门经济中,国民经济恒等式可写作( )A.I=SB.I=S+(T—G)C.I=S+TD.I=S+(T—G) +(M—X)