使用银量法测定苯巴比妥的含量时，指示 终点的方法是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30802' and id < 2480826 and id<>'2480826' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30802' and id > 2480826 and id<>'2480826' order by id asc limit 5