堆石坝坝体材料分区，主要有（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29436' and id < 2396723 and id<>'2396723' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29436' and id > 2396723 and id<>'2396723' order by id asc limit 5