就目前所知，调控植物向重力性生长的主要激素是（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25865' and id < 2171379 and id<>'2171379' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25865' and id > 2171379 and id<>'2171379' order by id asc limit 5