维生素C降解的主要途径是（    ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27511' and id < 2269736 and id<>'2269736' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27511' and id > 2269736 and id<>'2269736' order by id asc limit 5