效度和信度存在一定的关系:信度高，效度一定高;信度低，效度可能髙也可能低。( )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31420' and id < 2518462 and id<>'2518462' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31420' and id > 2518462 and id<>'2518462' order by id asc limit 5