下列担保中，担保金额在担保有效期内逐步减少的是(

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24807' and id < 2121219 and id<>'2121219' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24807' and id > 2121219 and id<>'2121219' order by id asc limit 5