不属于左冠状动脉的分支的血管是（     ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25729' and id < 2163006 and id<>'2163006' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25729' and id > 2163006 and id<>'2163006' order by id asc limit 5