WebOct 24, 2024 · C→F, E→A, EC→D, A→B. Which of the following is a key of R? (A) CD (B) EC (C) AE (D) AC Answer: (B) Explanation: To check find the closure for all {CD} = {CDF} {EC} = {ECDAFB} Only this is the key because it drives all attributes. {AE} = {AEB} {AC} = {ACBF} Hence, Option (B) is Correct. Quiz of this Question WebRankings were generated by a voting panel made up of media members. The media members were asked to vote for who they feel are the top fighters in the UFC by weight-class and pound-for-pound.

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WebNov 2, 2024 · 问：是不是关键词出价越高，排名越靠前？p4p排名规则是由关键词出价和推广评分共同决定的，客户在产品信息质量相同的情况下出价越高，排名是越靠前的。问：是 … WebAug 30, 2014 · Is there any working way to view that file in plain text and understand what is there in that file, I am asking for a education purpose only. help me out. ... y * Ê I ß X ÿ “ Ï ù » s H ˜ B Ï C B m = § ë Ò b Æ D 0 í _ ) e N ¿ ù R % › ï Ò ’ ‡ ¶ ° ) > < T N O ¥ Y ï F 8 Î € ô È c Y z ¬ W 7 K ) G , @ þ æ ... WebJun 5, 2024 · 闭包已知关系模式r（a，b，c），f是r上成立的fd集，f={a→b，b→c}， f的闭包f+有多少个？试写出（ab）+的所有闭包。解：根据已知条件和推理规则，可知f+有43个函数依赖。各种情况如下：答：f的闭包f+有43个；(ab)的闭包(ab)+ =abc设关系r（abcde）上fd集为f，并且f={a→bc，cd→e，b→d，e→a}。 robot chicken 6 million peso man