软件设计一般划分为两个阶段，两个阶段 依次是 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29840' and id < 2421773 and id<>'2421773' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29840' and id > 2421773 and id<>'2421773' order by id asc limit 5