丙酮酸羧化酶是哪一个反应中的关键酶？（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30918' and id < 2488156 and id<>'2488156' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30918' and id > 2488156 and id<>'2488156' order by id asc limit 5