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简述大众传媒成为现代社会中政策主体的一个重要因素的原因

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YouexperiencealossofthediskonwhichtheUSER_DATAtablespacedatafilesarestored.Youattempttorecoverthedatafilesbutdiscoverthatthearchivedredologfilewithsequencenumber45，whichisneededtoperformcompleterecovery，isinvalid.Youthenbeginincompleterecovery-Youreceivethisprompt：
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