甲、乙签订一份设备买卖合间。甲的下列行为中，属于履行附随义务的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29050' and id < 2365162 and id<>'2365162' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29050' and id > 2365162 and id<>'2365162' order by id asc limit 5