函数 的定义域为R，则k的取值范围是（    ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='16196' and id < 1362639 and id<>'1362639' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='16196' and id > 1362639 and id<>'1362639' order by id asc limit 5