设P={y|y=x2，x∈R}，Q={y|y=2x，x∈R}，则

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='22380' and id < 1959521 and id<>'1959521' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='22380' and id > 1959521 and id<>'1959521' order by id asc limit 5