促进植物向光弯曲最有效的光是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25864' and id < 2171298 and id<>'2171298' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25864' and id > 2171298 and id<>'2171298' order by id asc limit 5